--- /dev/null
+import { CallHierarchyItem, CallHierarchyPrepareParams, CallHierarchyIncomingCallsParams, CallHierarchyIncomingCall, CallHierarchyOutgoingCallsParams, CallHierarchyOutgoingCall } from 'vscode-languageserver-protocol';
+import type { Feature, _Languages, ServerRequestHandler } from './server';
+/**
+ * Shape of the call hierarchy feature
+ *
+ * @since 3.16.0
+ */
+export interface CallHierarchy {
+ callHierarchy: {
+ onPrepare(handler: ServerRequestHandler<CallHierarchyPrepareParams, CallHierarchyItem[] | null, never, void>): void;
+ onIncomingCalls(handler: ServerRequestHandler<CallHierarchyIncomingCallsParams, CallHierarchyIncomingCall[] | null, CallHierarchyIncomingCall[], void>): void;
+ onOutgoingCalls(handler: ServerRequestHandler<CallHierarchyOutgoingCallsParams, CallHierarchyOutgoingCall[] | null, CallHierarchyOutgoingCall[], void>): void;
+ };
+}
+export declare const CallHierarchyFeature: Feature<_Languages, CallHierarchy>;