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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_backend():
 """Get backend."""

    backend = getattr(settings, 'SIMDITOR_IMAGE_BACKEND', None)

    if backend == 'pillow':
        from simditor.image import pillow_backend as backend
    else:
        from simditor.image import dummy_backend as backend
    return backend