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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _create_memory_database_interface(self) -> GraphDatabaseInterface: """ Creates and returns the in-memory database interface the graph will use. """

        Base = declarative_base()
        engine = sqlalchemy.create_engine("sqlite://", poolclass=StaticPool)
        Session = sessionmaker(bind=engine)

        dbi: GraphDatabaseInterface = create_graph_database_interface(
            sqlalchemy, Session(), Base, sqlalchemy.orm.relationship
        )

        Base.metadata.drop_all(engine)
        Base.metadata.create_all(engine)

        return dbi