Method _notify

src/lsp/client.js:181–185

(method, params)

  }

  _notify(method, params) {
    if (!this.process) return;
    const msg = { jsonrpc: '2.0', method, params };
    this.process.stdin.write(encodeMessage(msg));
  }

  _onData(data) {
    this.buffer += data;