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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_subclasses(package):
 """Loads the subclass settings for the specified package so that we can decorate the classes correctly. """

    global _explicit_subclasses
    from acorn.config import settings
    spack = settings(package)
    if spack is not None:
        if spack.has_section("subclass"):
            _explicit_subclasses.update(dict(spack.items("subclass")))