void appendValuesClause(StringBuilder sb) {
        sb.append("VALUES ");
        appendValues(sb, jdbcTable.dbFieldNames().size());
    }
@Test
    void appendValuesClause() {
        MySQLUpsertQueryBuilder builder = new MySQLUpsertQueryBuilder(jdbcTable, dialect);
        StringBuilder sb = new StringBuilder();
        builder.appendValuesClause(sb);

        String valuesClause = sb.toString();
        assertThat(valuesClause).isEqualTo("VALUES (?,?)");
    }