def __getModelClasses():
    """Import all classes not leaking any additional declarations"""
    import pkgutil
    from importlib import import_module
    from . import model
    package = '.'.join(model.__name__.split('.')[:-1])
    for mdata in pkgutil.iter_modules(model.__path__):
        mod = import_module('.'.join([package, 'model', mdata[1]]))
        globals()[mdata[1]] = getattr(mod, mdata[1])
    del globals()['__getModelClasses']
