docs: def __convertChannelMask(self, channelsArray):
          """convert channelsArray to bitmask format
  
          Args:
              channelsArray: channel array (i.e. [21, 22])
  
          Returns:
              bitmask format corresponding to a given channel array
          """
          maskSet = 0
  
          for eachChannel in channelsArray:
              mask = 1 << eachChannel
              maskSet = (maskSet | mask)
  
          return maskSet