code: def _set_parameters(self, parameters):
          
          for theta in self.variables['theta']:
              val = 1.0
              # TODO: improve approach for initializing parameters.
              if parameters is not None:
                  if theta.name in parameters:
                      val = parameters[theta.name]
              # Add parameter.
              
              self.link_parameters(Param(theta.name, val, None))
docs: Add parameters to the model and initialize with given values.