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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_phantom_root_catalog(self, cat_name, cat_class):
 """Get's the catalog id corresponding to the root of all implementation catalogs."""

        catalog_map = make_catalog_map(cat_name, identifier=PHANTOM_ROOT_IDENTIFIER)
        return cat_class(osid_object_map=catalog_map, runtime=self._runtime, proxy=self._proxy)