code: def _get_renamed_deleted_sourcesapp(self):
          
          # renamed_sources and deleted_sources are dicts with "source" as key
          # and "renamed_source" or deletion flag as value.
          renamed_sources = {}
          deleted_sources = {}
  
          # Collect tags for AppCommand.xml call
          tags = ["GetRenameSource", "GetDeletedSource"]
          # Execute call
          root = self.exec_appcommand_post(tags)
          # Check result
          if root is None:
              _LOGGER.error("Getting renamed and deleted sources failed.")
              return (renamed_sources, deleted_sources, False)
  
          # Detect "Document Error: Data follows" title if URL does not exist
          document_error = root.find("./head/title")
          if document_error is not None:
              if document_error.text == "Document Error: Data follows":
                  return (renamed_sources, deleted_sources, False)
  
          for child in root.findall("./cmd/functionrename/list"):
              try:
                  renamed_sources[child.find("name").text.strip()] = (
                      child.find("rename").text.strip())
              except AttributeError:
                  continue
  
          for child in root.findall("./cmd/functiondelete/list"):
              try:
                  deleted_sources[child.find("FuncName").text.strip(
                  )] = "DEL" if (
                      child.find("use").text.strip() == "0") else None
              except AttributeError:
                  continue
  
          return (renamed_sources, deleted_sources, True)
docs: Get renamed and deleted sources lists from receiver .
  
          Internal method which queries device via HTTP to get names of renamed
          input sources. In this method AppCommand.xml is used.