code: def parse(cls, root):
          
          subsection = root.tag.replace(utils.lxmlns("mets"), "", 1)
          if subsection not in cls.ALLOWED_SUBSECTIONS:
              raise exceptions.ParseError(
                  "SubSection can only parse elements with tag in %s with METS namespace"
                  % (cls.ALLOWED_SUBSECTIONS,)
              )
          section_id = root.get("ID")
          created = root.get("CREATED", "")
          status = root.get("STATUS", "")
          child = root[0]
          if child.tag == utils.lxmlns("mets") + "mdWrap":
              mdwrap = MDWrap.parse(child)
              obj = cls(subsection, mdwrap, section_id)
          elif child.tag == utils.lxmlns("mets") + "mdRef":
              mdref = MDRef.parse(child)
              obj = cls(subsection, mdref, section_id)
          else:
              raise exceptions.ParseError(
                  "Child of %s must be mdWrap or mdRef" % subsection
              )
          obj.created = created
          obj.status = status
          return obj
docs: Create a new SubSection by parsing root.
  
          :param root: Element or ElementTree to be parsed into an object.
          :raises exceptions.ParseError: If root's tag is not in :const:`SubSection.ALLOWED_SUBSECTIONS`.
          :raises exceptions.ParseError: If the first child of root is not mdRef or mdWrap.