Method extension

src/docx/opc/oxml.py:101–103

String held in the ``Extension`` attribute of this `` `` element.

(self)

    @property
    def extension(self):
        """String held in the ``Extension`` attribute of this ``<Default>`` element."""
        return self.get("Extension")

    @staticmethod
    def new(ext: str, content_type: str):