send() {
    if (!this.process.connected) {
      return false;
    }
    return this.process.send(...arguments);
  }
Sends a message to the child process. Same as ChildProcess.send()
@params {Object}   message     Message to send
For other parameters, see:
 https://nodejs.org/api/child_process.html#child_process_subprocess_send_message_sendhandle_options_callback
@return {void}