How to use the bfx-api-node-models.FundingTicker function in bfx-api-node-models

_handleTickerMessage (msg = [], chanData = {}) {
    let data = getMessagePayload(msg)

    if (this._transform) {
      data = (chanData.symbol || '')[0] === 't'
        ? new TradingTicker([chanData.symbol, ...msg[1]])
        : new FundingTicker([chanData.symbol, ...msg[1]])
    }

    const internalMessage = [chanData.chanId, 'ticker', data]
    internalMessage.filterOverride = [chanData.symbol]

    this._propagateMessageToListeners(internalMessage, chanData, false)
    this.emit('ticker', chanData.symbol, data)
  }