code: def get_suffix_tree(self, suffix_tree_id):
          
          suffix_tree = self.suffix_tree_repo[suffix_tree_id]
          assert isinstance(suffix_tree, GeneralizedSuffixTree)
          suffix_tree._node_repo = self.node_repo
          suffix_tree._node_child_collection_repo = self.node_child_collection_repo
          suffix_tree._edge_repo = self.edge_repo
          suffix_tree._stringid_collection_repo = self.stringid_collection_repo
          return suffix_tree
docs: Returns a suffix tree entity, equipped with node and edge repos it (at least at the moment) needs.