GraphQueryEngine

def init_db(self, input_doc: Optional[list[Document]] = None) -> None:
    """This method initializes graph database with the input documents or records.
    Usually, it takes the following steps,
    1. connecting to a graph database.
    2. extract graph nodes, edges based on input data, graph schema and etc.
    3. build indexes etc.

    Args:
    input_doc: a list of input documents that are used to build the graph in database.

    """
    pass

def add_records(self, new_records: list[Any]) -> bool:
    """Add new records to the underlying database and add to the graph if required."""
    pass

def query(self, question: str, n_results: int = 1, **kwarg: Any) -> GraphStoreQueryResult:
    """This method transform a string format question into database query and return the result."""
    pass