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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 _load(root):
 """Load from an xml.etree.ElementTree"""

    types = _load_types(root)
    enums = _load_enums(root)
    commands = _load_commands(root)
    features = _load_features(root)
    extensions = _load_extensions(root)
    return Registry(None, types, enums, commands, features, extensions)