code: def _onCoreModuleLoad(self, event):
          '''
          Clear the cached model rows and rebuild them only if they have been loaded already.
          '''
          if not self._modelRuntsByBuid:
              return
          # Discard previously cached data. It will be computed upon the next
          # lift that needs it.
          self._modelRuntsByBuid = {}
          self._modelRuntsByPropValu = collections.defaultdict(listf _onCoreModuleLoad(self, event):
          '''
          Clear the cached model rows and rebuild them only if they have been loaded already.
          '''
          if not self._modelRuntsByBuid:
              return
          # Discard previously cached data. It will be computed upon the next
          # lift that needs it.
          self._modelRuntsByBuid = {}
          self._modelRuntsByPropValu = collections.defaultdict(list)
docs: Clear the cached model rows and rebuild them only if they have been loaded already.