docs: function RAgent_send(name, body, cb) {
    if (!this._session) return
  
    var reqID = this._nextReqID()
  
    this._requestCBs.set(reqID, cb)
  
    var message = {
      type: "request",
      name: name,
      to:   this.info.id,
      id:   reqID,
      body: body
    }
  
    this._session._sendMessage(message)
  }