### Question:
TableDataUtil { public static String getSqlColumnQuotedString(String value) { Validate.notNull(value, "value must not be null"); return getSqlQuotedString(value, FIELD_QUOTE_SIGN); } private  TableDataUtil(); static String getSqlValueQuotedString(String value); static String getSqlColumnQuotedString(String value);  }### Answer:
@Test public void getSqlColumnQuotedStringTest() { Assert.assertEquals(TableDataUtil.getSqlColumnQuotedString("tableName"), "`tableName`"); }