send(method, payload, cb) {
    if (this.enabled) {
      this.payload[method] = payload
    }

    cb(null, { retainData: false })
  }
Generic method to send data by a specific event type

@param {string} method list of collector method
@param {Array} payload The data payload to serialize for a given method.
@param {Function} cb The callback to invoke when finished.