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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_model(method):
 """Convert string to model class."""


    @wraps(method)
    def wrapper(migrator, model, *args, **kwargs):
        if isinstance(model, str):
            return method(migrator, migrator.orm[model], *args, **kwargs)
        return method(migrator, model, *args, **kwargs)
    return wrapper