Interface CallHierarchyMiddleware

interface CallHierarchyMiddleware {
    prepareCallHierarchy?: (
        this: void,
        document: TextDocument,
        positions: Position,
        token: CancellationToken,
        next: PrepareCallHierarchySignature,
    ) => ProviderResult<CallHierarchyItem | CallHierarchyItem[]>;
    provideCallHierarchyIncomingCalls?: (
        this: void,
        item: CallHierarchyItem,
        token: CancellationToken,
        next: CallHierarchyIncomingCallsSignature,
    ) => ProviderResult<CallHierarchyIncomingCall[]>;
    provideCallHierarchyOutgoingCalls?: (
        this: void,
        item: CallHierarchyItem,
        token: CancellationToken,
        next: CallHierarchyOutgoingCallsSignature,
    ) => ProviderResult<CallHierarchyOutgoingCall[]>;
}