src/vs/workbench/api/common/extHostLanguageFeatures.ts/ExtHostLanguageFeatures/$provideCallHierarchyIncomingCalls
class ExtHostLanguageFeatures:	$provideCallHierarchyIncomingCalls(handle: number, sessionId: string, itemId: string, token: CancellationToken): Promise<extHostProtocol.IIncomingCallDto[] | undefined> {
		return this._withAdapter(handle, CallHierarchyAdapter, adapter => adapter.provideCallsTo(sessionId, itemId, token), undefined);
	}