code: def get_terminal_converted(self, attr):
          
          value = self.data.get(attr.repr_name)
          return self.converter_registry.convert_to_representation(
                                                              value,
                                                              attr.value_type)
docs: Returns the value of the specified attribute converted to a
          representation value.
  
          :param attr: Attribute to retrieve.
          :type attr: :class:`everest.representers.attributes.MappedAttribute`
          :returns: Representation string.