public static SqlToFunctionConverter sqlToFunctionConverter() {
    return SQL_TO_FUNCTION_CONVERTER;
  }
@Test
  public void shouldGetParamTypesForAllSqlTypes() {
    for (final Entry<SqlType, ParamType> entry : SQL_TO_FUNCTION.entrySet()) {
      final SqlType sqlType = entry.getKey();
      final ParamType javaType = entry.getValue();
      final ParamType result = SchemaConverters.sqlToFunctionConverter().toFunctionType(sqlType);
      assertThat(result, equalTo(javaType));
    }
  }