code: def sectionByID(self, sectionID):
          
          if not self._sectionsByID or sectionID not in self._sectionsByID:
              self.sections()
          return self._sectionsByID[sectionID]
docs: Returns the :class:`~plexapi.library.LibrarySection` that matches the specified sectionID.
  
              Parameters:
                  sectionID (str): ID of the section to return.