First commit.

Signed-off-by: Chen Xiao <abigwc@gmail.com>

client/node_modules/vscode-jsonrpc/lib/common/cancellation.d.ts

@@ -0,0 +1,32 @@
+import { Event } from './events';
+import { Disposable } from './disposable';
+/**
+ * Defines a CancellationToken. This interface is not
+ * intended to be implemented. A CancellationToken must
+ * be created via a CancellationTokenSource.
+ */
+export interface CancellationToken {
+    /**
+     * Is `true` when the token has been cancelled, `false` otherwise.
+     */
+    readonly isCancellationRequested: boolean;
+    /**
+     * An {@link Event event} which fires upon cancellation.
+     */
+    readonly onCancellationRequested: Event<any>;
+}
+export declare namespace CancellationToken {
+    const None: CancellationToken;
+    const Cancelled: CancellationToken;
+    function is(value: any): value is CancellationToken;
+}
+export interface AbstractCancellationTokenSource extends Disposable {
+    token: CancellationToken;
+    cancel(): void;
+}
+export declare class CancellationTokenSource implements AbstractCancellationTokenSource {
+    private _token;
+    get token(): CancellationToken;
+    cancel(): void;
+    dispose(): void;
+}