src/vs/workbench/services/extensions/common/rpcProtocol.ts/RPCProtocol/_checkUnresponsive
class RPCProtocol:	private _checkUnresponsive(): void {
		if (this._unacknowledgedCount === 0) {
			// Not waiting for anything => cannot say if it is responsive or not
			return;
		}

		if (Date.now() > this._unresponsiveTime) {
			// Unresponsive!!
			this._setResponsiveState(ResponsiveState.Unresponsive);
		} else {
			// Not (yet) unresponsive, be sure to check again soon
			this._asyncCheckUresponsive.schedule();
		}
	}