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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_interface(model):
 """ Return the interface specific classes. Parameters model : cobra.Model The metabolic model under investigation. """

    return (
        model.solver.interface.Model,
        model.solver.interface.Constraint,
        model.solver.interface.Variable,
        model.solver.interface.Objective
    )