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<a href="../modules.html">VS Code API</a>
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<li>
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<a href="CallHierarchyProvider.html">CallHierarchyProvider</a>
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</li>
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</ul>
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<h1>Interface CallHierarchyProvider</h1>
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</div>
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</div>
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</header>
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<section class="tsd-panel tsd-comment">
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<div class="tsd-comment tsd-typography">
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<div class="lead">
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<p>The call hierarchy provider interface describes the contract between extensions
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and the call hierarchy feature which allows to browse calls and caller of function,
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methods, constructor etc.</p>
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</div>
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</div>
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</section>
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<section class="tsd-panel tsd-hierarchy">
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<h3>Hierarchy</h3>
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<ul class="tsd-hierarchy">
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<li>
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<span class="target">CallHierarchyProvider</span>
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</li>
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</ul>
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</section>
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<section class="tsd-panel-group tsd-index-group">
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<h2>Index</h2>
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<section class="tsd-panel tsd-index-panel">
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<div class="tsd-index-content">
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<section class="tsd-index-section ">
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<h3>Methods</h3>
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<ul class="tsd-index-list">
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<li class="tsd-kind-method tsd-parent-kind-interface"><a href="CallHierarchyProvider.html#prepareCallHierarchy" class="tsd-kind-icon">prepare<wbr>Call<wbr>Hierarchy</a></li>
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<li class="tsd-kind-method tsd-parent-kind-interface"><a href="CallHierarchyProvider.html#provideCallHierarchyIncomingCalls" class="tsd-kind-icon">provide<wbr>Call<wbr>Hierarchy<wbr>Incoming<wbr>Calls</a></li>
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<li class="tsd-kind-method tsd-parent-kind-interface"><a href="CallHierarchyProvider.html#provideCallHierarchyOutgoingCalls" class="tsd-kind-icon">provide<wbr>Call<wbr>Hierarchy<wbr>Outgoing<wbr>Calls</a></li>
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</ul>
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</section>
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</div>
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</section>
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</section>
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<section class="tsd-panel-group tsd-member-group ">
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<h2>Methods</h2>
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<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
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<a name="prepareCallHierarchy" class="tsd-anchor"></a>
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<h3>prepare<wbr>Call<wbr>Hierarchy</h3>
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<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
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<li class="tsd-signature tsd-kind-icon">prepare<wbr>Call<wbr>Hierarchy<span class="tsd-signature-symbol">(</span>document<span class="tsd-signature-symbol">: </span><a href="TextDocument.html" class="tsd-signature-type" data-tsd-kind="Interface">TextDocument</a>, position<span class="tsd-signature-symbol">: </span><a href="../classes/Position.html" class="tsd-signature-type" data-tsd-kind="Class">Position</a>, token<span class="tsd-signature-symbol">: </span><a href="CancellationToken.html" class="tsd-signature-type" data-tsd-kind="Interface">CancellationToken</a><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="../modules.html#ProviderResult" class="tsd-signature-type" data-tsd-kind="Type alias">ProviderResult</a><span class="tsd-signature-symbol"><</span><a href="../classes/CallHierarchyItem.html" class="tsd-signature-type" data-tsd-kind="Class">CallHierarchyItem</a><span class="tsd-signature-symbol"> | </span><a href="../classes/CallHierarchyItem.html" class="tsd-signature-type" data-tsd-kind="Class">CallHierarchyItem</a><span class="tsd-signature-symbol">[]</span><span class="tsd-signature-symbol">></span></li>
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</ul>
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<ul class="tsd-descriptions">
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<li class="tsd-description">
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<aside class="tsd-sources">
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<ul>
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<li>Defined in <a href="https://github.com/youngjuning/vscode-api/blob/98bc825/vscode.d.ts#L4741">vscode.d.ts:4741</a></li>
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</ul>
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</aside>
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<div class="tsd-comment tsd-typography">
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<div class="lead">
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<p>Bootstraps call hierarchy by returning the item that is denoted by the given document
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and position. This item will be used as entry into the call graph. Providers should
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return <code>undefined</code> or <code>null</code> when there is no item at the given location.</p>
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</div>
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</div>
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<h4 class="tsd-parameters-title">Parameters</h4>
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<ul class="tsd-parameters">
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<li>
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<h5>document: <a href="TextDocument.html" class="tsd-signature-type" data-tsd-kind="Interface">TextDocument</a></h5>
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<div class="tsd-comment tsd-typography">
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<p>The document in which the command was invoked.</p>
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</div>
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</li>
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<li>
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<h5>position: <a href="../classes/Position.html" class="tsd-signature-type" data-tsd-kind="Class">Position</a></h5>
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<div class="tsd-comment tsd-typography">
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<p>The position at which the command was invoked.</p>
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</div>
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</li>
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<li>
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<h5>token: <a href="CancellationToken.html" class="tsd-signature-type" data-tsd-kind="Interface">CancellationToken</a></h5>
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<div class="tsd-comment tsd-typography">
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<p>A cancellation token.</p>
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</div>
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</li>
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</ul>
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<h4 class="tsd-returns-title">Returns <a href="../modules.html#ProviderResult" class="tsd-signature-type" data-tsd-kind="Type alias">ProviderResult</a><span class="tsd-signature-symbol"><</span><a href="../classes/CallHierarchyItem.html" class="tsd-signature-type" data-tsd-kind="Class">CallHierarchyItem</a><span class="tsd-signature-symbol"> | </span><a href="../classes/CallHierarchyItem.html" class="tsd-signature-type" data-tsd-kind="Class">CallHierarchyItem</a><span class="tsd-signature-symbol">[]</span><span class="tsd-signature-symbol">></span></h4>
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<p>A call hierarchy item or a thenable that resolves to such. The lack of a result can be
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signaled by returning <code>undefined</code> or <code>null</code>.</p>
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</li>
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</ul>
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</section>
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<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
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<a name="provideCallHierarchyIncomingCalls" class="tsd-anchor"></a>
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<h3>provide<wbr>Call<wbr>Hierarchy<wbr>Incoming<wbr>Calls</h3>
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<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
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<li class="tsd-signature tsd-kind-icon">provide<wbr>Call<wbr>Hierarchy<wbr>Incoming<wbr>Calls<span class="tsd-signature-symbol">(</span>item<span class="tsd-signature-symbol">: </span><a href="../classes/CallHierarchyItem.html" class="tsd-signature-type" data-tsd-kind="Class">CallHierarchyItem</a>, token<span class="tsd-signature-symbol">: </span><a href="CancellationToken.html" class="tsd-signature-type" data-tsd-kind="Interface">CancellationToken</a><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="../modules.html#ProviderResult" class="tsd-signature-type" data-tsd-kind="Type alias">ProviderResult</a><span class="tsd-signature-symbol"><</span><a href="../classes/CallHierarchyIncomingCall.html" class="tsd-signature-type" data-tsd-kind="Class">CallHierarchyIncomingCall</a><span class="tsd-signature-symbol">[]</span><span class="tsd-signature-symbol">></span></li>
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</ul>
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<ul class="tsd-descriptions">
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<li class="tsd-description">
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<aside class="tsd-sources">
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<ul>
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<li>Defined in <a href="https://github.com/youngjuning/vscode-api/blob/98bc825/vscode.d.ts#L4753">vscode.d.ts:4753</a></li>
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</ul>
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</aside>
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<div class="tsd-comment tsd-typography">
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<div class="lead">
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<p>Provide all incoming calls for an item, e.g all callers for a method. In graph terms this describes directed
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and annotated edges inside the call graph, e.g the given item is the starting node and the result is the nodes
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that can be reached.</p>
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</div>
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</div>
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<h4 class="tsd-parameters-title">Parameters</h4>
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<ul class="tsd-parameters">
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<li>
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<h5>item: <a href="../classes/CallHierarchyItem.html" class="tsd-signature-type" data-tsd-kind="Class">CallHierarchyItem</a></h5>
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<div class="tsd-comment tsd-typography">
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<p>The hierarchy item for which incoming calls should be computed.</p>
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</div>
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</li>
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<li>
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<h5>token: <a href="CancellationToken.html" class="tsd-signature-type" data-tsd-kind="Interface">CancellationToken</a></h5>
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<div class="tsd-comment tsd-typography">
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<p>A cancellation token.</p>
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</div>
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</li>
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</ul>
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<h4 class="tsd-returns-title">Returns <a href="../modules.html#ProviderResult" class="tsd-signature-type" data-tsd-kind="Type alias">ProviderResult</a><span class="tsd-signature-symbol"><</span><a href="../classes/CallHierarchyIncomingCall.html" class="tsd-signature-type" data-tsd-kind="Class">CallHierarchyIncomingCall</a><span class="tsd-signature-symbol">[]</span><span class="tsd-signature-symbol">></span></h4>
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<p>A set of incoming calls or a thenable that resolves to such. The lack of a result can be
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signaled by returning <code>undefined</code> or <code>null</code>.</p>
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</li>
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</ul>
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</section>
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<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
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<a name="provideCallHierarchyOutgoingCalls" class="tsd-anchor"></a>
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<h3>provide<wbr>Call<wbr>Hierarchy<wbr>Outgoing<wbr>Calls</h3>
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<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
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<li class="tsd-signature tsd-kind-icon">provide<wbr>Call<wbr>Hierarchy<wbr>Outgoing<wbr>Calls<span class="tsd-signature-symbol">(</span>item<span class="tsd-signature-symbol">: </span><a href="../classes/CallHierarchyItem.html" class="tsd-signature-type" data-tsd-kind="Class">CallHierarchyItem</a>, token<span class="tsd-signature-symbol">: </span><a href="CancellationToken.html" class="tsd-signature-type" data-tsd-kind="Interface">CancellationToken</a><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="../modules.html#ProviderResult" class="tsd-signature-type" data-tsd-kind="Type alias">ProviderResult</a><span class="tsd-signature-symbol"><</span><a href="../classes/CallHierarchyOutgoingCall.html" class="tsd-signature-type" data-tsd-kind="Class">CallHierarchyOutgoingCall</a><span class="tsd-signature-symbol">[]</span><span class="tsd-signature-symbol">></span></li>
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</ul>
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<ul class="tsd-descriptions">
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<li class="tsd-description">
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<aside class="tsd-sources">
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<ul>
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<li>Defined in <a href="https://github.com/youngjuning/vscode-api/blob/98bc825/vscode.d.ts#L4765">vscode.d.ts:4765</a></li>
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</ul>
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</aside>
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<div class="tsd-comment tsd-typography">
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<div class="lead">
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<p>Provide all outgoing calls for an item, e.g call calls to functions, methods, or constructors from the given item. In
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graph terms this describes directed and annotated edges inside the call graph, e.g the given item is the starting
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node and the result is the nodes that can be reached.</p>
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</div>
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</div>
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<h4 class="tsd-parameters-title">Parameters</h4>
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<ul class="tsd-parameters">
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<li>
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<h5>item: <a href="../classes/CallHierarchyItem.html" class="tsd-signature-type" data-tsd-kind="Class">CallHierarchyItem</a></h5>
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<div class="tsd-comment tsd-typography">
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<p>The hierarchy item for which outgoing calls should be computed.</p>
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</div>
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</li>
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<li>
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<h5>token: <a href="CancellationToken.html" class="tsd-signature-type" data-tsd-kind="Interface">CancellationToken</a></h5>
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<div class="tsd-comment tsd-typography">
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<p>A cancellation token.</p>
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</div>
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</li>
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</ul>
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<h4 class="tsd-returns-title">Returns <a href="../modules.html#ProviderResult" class="tsd-signature-type" data-tsd-kind="Type alias">ProviderResult</a><span class="tsd-signature-symbol"><</span><a href="../classes/CallHierarchyOutgoingCall.html" class="tsd-signature-type" data-tsd-kind="Class">CallHierarchyOutgoingCall</a><span class="tsd-signature-symbol">[]</span><span class="tsd-signature-symbol">></span></h4>
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<p>A set of outgoing calls or a thenable that resolves to such. The lack of a result can be
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signaled by returning <code>undefined</code> or <code>null</code>.</p>
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</li>
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</ul>
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</section>
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</section>
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<div class="col-4 col-menu menu-sticky-wrap menu-highlight">
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<nav class="tsd-navigation primary">
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