text: from yowsup.layers import YowLayer
  import logging
  logger = logging.getLogger(__name__)
  class YowLoggerLayer(YowLayer):
  
      def send(self, data):
          ldata = list(data) if type(data) is bytearray else data
          logger.debug("tx:\n%s" % ldata)
          self.toLower(data)
  
      def receive(self, data):
          ldata = list(data) if type(data) is bytearray else data
          logger.debug("rx:\n%s" % ldata)
          self.toUpper(data)
  
      def __str__(self):
          return "Logger Layer"