extensions/typescript-language-features/src/tsServer/server.ts/ProcessBasedTsServer/sendRequest
class ProcessBasedTsServer:	private sendRequest(requestItem: RequestItem): void {
		const serverRequest = requestItem.request;
		this._tracer.traceRequest(this._serverId, serverRequest, requestItem.expectsResponse, this._requestQueue.length);

		if (requestItem.expectsResponse && !requestItem.isAsync) {
			this._pendingResponses.add(requestItem.request.seq);
		}

		try {
			this.write(serverRequest);
		} catch (err) {
			const callback = this.fetchCallback(serverRequest.seq);
			callback?.onError(err);
		}
	}