def model2(self):
     model = ConcreteModel()
     model.prop_param = swco2.SWCO2ParameterBlock()
     model.prop_in = swco2.SWCO2StateBlock(
         default={"parameters": model.prop_param}
     )
     return model
 def model_transport(self):
     # This model is used to test transport properties
     model = ConcreteModel()
     model.prop_param = swco2.SWCO2ParameterBlock()
     model.prop_in = swco2.SWCO2StateBlock(
         default={"parameters": model.prop_param})
     return model