docs: def signed_raw(self) -> str:
          """
          Return Revocation signed raw document string
  
          :return:
          """
          if not isinstance(self.identity, Identity):
              raise MalformedDocumentError("Can not return full revocation document created from inline")
  
          raw = self.raw()
          signed = "\n".join(self.signatures)
          signed_raw = raw + signed + "\n"
          return signed_raw