public void close() throws SQLException {
        databaseConnectionManager.unmarkResourceInUse(proxyBackendHandler);
        proxyBackendHandler.close();
    }
@Test
    void assertClose() throws SQLException {
        PostgreSQLServerPreparedStatement preparedStatement = new PostgreSQLServerPreparedStatement("",
                new UnknownSQLStatementContext(new PostgreSQLEmptyStatement()), new HintValueContext(), Collections.emptyList(), Collections.emptyList());
        new Portal("", preparedStatement, Collections.emptyList(), Collections.emptyList(), databaseConnectionManager).close();
        verify(databaseConnectionManager).unmarkResourceInUse(proxyBackendHandler);
        verify(proxyBackendHandler).close();
    }