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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 listMetaContentTypes(self):
 """The content types with metadata """


        all_md_content_types = (
            CT_CORE_PROPS,
            CT_EXT_PROPS,
            CT_CUSTOM_PROPS)
        return [k for k in self.overrides.keys() if k in all_md_content_types]