anchor.diff:  [source,python]
   ----
   
  -    def get_streams (self, direction = 0):
  +    def get_streams (self, direction = 0, **kwargs):
           return [STLStream(packet = STLPktBuilder(pkt ="yaml/udp_64B_no_crc.pcap",
                                                    path_relative_to_profile = True), <1>
                            mode = STLTXCont(pps=10)) ] 
  
positive.code: 
  class STLS1(object):
  
      def get_streams (self, direction = 0):
          return [STLStream(packet = 
                            STLPktBuilder(
                            pkt ="stl/yaml/udp_64B_no_crc.pcap"), 
  
negative.code:                              )
                 ]
  
      def get_streams (self, direction = 0, **kwargs):
          return self.create_streams()
  ----
  
  