code: def get_parameter_vector(self, include_frozen=False):
          
          if include_frozen:
              return self.parameter_vector
          return self.parameter_vector[self.unfrozen_mask]
docs: Get an array of the parameter values in the correct order
  
          Args:
              include_frozen (Optional[bool]): Should the frozen parameters be
                  included in the returned value? (default: ``False``)