human
Solve the following python programming problem given the following code:
def test_dangling_resource_loads_data(self) : 
    self.defs = { 
        'Instance' : { 
            'identifiers' : [{ 
                'name' : 'Id', 
}], 
            'has' : { 
                'NetworkInterface' : { 
                    'resource' : { 
                        'type' : 'NetworkInterface', 
                        'identifiers' : [{ 
                            'target' : 'Id', 
                            'source' : 'data', 
                            'path' : 'NetworkInterface.Id', 
}], 
                        'path' : 'NetworkInterface', 
}, 
}, 
}, 
}, 
        'NetworkInterface' : { 
            'identifiers' : [{ 
                'name' : 'Id', 
}], 
            'shape' : 'NetworkInterfaceShape', 
}, 
} 
    self.model = self.defs ['Instance'] 
    shape = DenormalizedStructureBuilder ().with_members ({ 
        'Id' : { 
            'type' : 'string', 
}, 
        'PublicIp' : { 
            'type' : 'string', 
}, 
}).build_model () 
    service_model = mock.Mock () 
    service_model.shape_for.return_value = shape 
    cls = self.load ('Instance', interface.model, self.defs, service_model) 
    instance = cls ('instance-id') 
    def set_meta_data() : 
        instance.meta.data = { 
            'NetworkInterface' : { 
                'Id' : 'network-interface-id', 
                'PublicIp' : '127.0.0.1', 
}, 
} 
instance.load = mock.Mock (side_effect = set_meta_data) 
    interface = instance.network_interface 
    self.assertIsNotNone (interface.meta.data) 
    self.assertEqual (interface.public_ip, '127.0.0.1') 

    
    

    Fix the buggy line: cls = self.load ('Instance', interface.model, self.defs, service_model)
assistant
#Here is Python code to fix the buggy line: cls = self.

cls = self.load ('Instance', self.model, self.defs, service_model)