public static JavaToSqlTypeConverter javaToSqlConverter() {
    return JAVA_TO_SQL_CONVERTER;
  }
@Test
  public void shouldGetSqlMapForImplementationsOfJavaMap() {
    ImmutableList.<Class<?>>of(
        HashMap.class,
        ImmutableMap.class
    ).forEach(javaType -> {
      assertThat(javaToSqlConverter().toSqlType(javaType), is(SqlBaseType.MAP));
    });
  }