_handleStatusMessage (msg, chanData) {
    const { key } = chanData
    const data = getMessagePayload(msg)

    const internalMessage = [chanData.chanId, 'status', data]
    internalMessage.filterOverride = [chanData.key]

    this._propagateMessageToListeners(internalMessage, chanData, false)
    this.emit('status', data, key)
  }
Called for messages from a 'status' channel.

@param {Array|Array[]} msg - incoming message
@param {object} chanData - entry from _channelMap
@private