public static SerializableFunction<Row, TableRow> toTableRow() {
    return ROW_TO_TABLE_ROW;
  }
@Test
  public void testToTableRow_enum() {
    TableRow row = toTableRow().apply(ENUM_ROW);

    assertThat(row.size(), equalTo(1));
    assertThat(row, hasEntry("color", "GREEN"));
  }