code: def _empty_value(self, formattype):
          '''
              returns default empty value 
          :param formattype:
          :param buff:
          :param start:
          :param end:
          '''
          if formattype.value.idx <= FormatType.BIN_32.value.idx:  # @UndefinedVariable
              return b''
          elif formattype.value.idx <= FormatType.FIXSTR.value.idx:  # @UndefinedVariable  
              return ''
          elif formattype.value.idx <= FormatType.INT_64.value.idx:  # @UndefinedVariable
              return 0
          elif formattype.value.idx <= FormatType.UINT_64.value.idx:  # @UndefinedVariable
              return 0
          elif(formattype is FormatType.FLOAT_32):
              return float(0)
          elif(formattype is FormatType.FLOAT_64):
              return float(0f _empty_value(self, formattype):
          '''
              returns default empty value 
          :param formattype:
          :param buff:
          :param start:
          :param end:
          '''
          if formattype.value.idx <= FormatType.BIN_32.value.idx:  # @UndefinedVariable
              return b''
          elif formattype.value.idx <= FormatType.FIXSTR.value.idx:  # @UndefinedVariable  
              return ''
          elif formattype.value.idx <= FormatType.INT_64.value.idx:  # @UndefinedVariable
              return 0
          elif formattype.value.idx <= FormatType.UINT_64.value.idx:  # @UndefinedVariable
              return 0
          elif(formattype is FormatType.FLOAT_32):
              return float(0)
          elif(formattype is FormatType.FLOAT_64):
              return float(0)
docs: returns default empty value 
          :param formattype:
          :param buff:
          :param start:
          :param end: