def setUp(self):

        from sas.models.OnionExpShellModel import OnionExpShellModel
        from sas.models.CoreMultiShellModel import CoreMultiShellModel
        from sas.models.VesicleModel import VesicleModel 
        
        # intit models and the multifactor
        self.model = OnionExpShellModel(1)
        self.model2 = OnionExpShellModel(1).model
        self.model3 = CoreMultiShellModel(1)
        self.model4 = VesicleModel()
        self.model5 = OnionExpShellModel(9)
    def setUp(self):

        from sas.models.SphericalSLDModel import SphericalSLDModel
        from sas.models.OnionExpShellModel import OnionExpShellModel

        # intit models and the multifactor
        # layer
        self.model = SphericalSLDModel(1)
        self.model2 = OnionExpShellModel(3)