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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(app, model):
 """Wrapper around django's get_model."""

    if 'get_model' not in _LAZY_LOADS:
        _lazy_load_get_model()

    _get_model = _LAZY_LOADS['get_model']
    return _get_model(app, model)