for (ImmutableTable<Character, Integer, String> testInstance : getTestInstances()) {
      assertEquals(ImmutableMap.of('a', "foo", 'b', "bar"), testInstance.column(1));
      assertEquals(ImmutableMap.of('a', "baz"), testInstance.column(2));
      assertEquals(ImmutableMap.of(), testInstance.column(3));
    }
  }

  public void testColumnKeySet() {
    for (ImmutableTable<Character, Integer, String> testInstance : getTestInstances()) {

	if tableName != "public.company" {
		t.Errorf("invalid table name generated, got %v", tableName)
	}

	columdName := ns.ColumnName("", "NameCID")
	if columdName != "name_cid" {
		t.Errorf("invalid column name generated, got %v", columdName)
	}
}

type CustomReplacer struct {
	f func(string) string
}

func (r CustomReplacer) Replace(name string) string {
	return r.f(name)
}

        problem = new DefaultProblem(null, null, null, -1, 127, null);
        assertEquals("column 127", problem.getLocation());

        problem = new DefaultProblem(null, null, "SOURCE", 42, 127, null);
        assertEquals("SOURCE, line 42, column 127", problem.getLocation());
    }

    @Test
    void testGetMessage() {

    //                                                                    ================
    // -----------------------------------------------------
    //                                       Column Property
    //                                       ---------------
    protected final Map<String, PropertyGateway> _epgMap = newHashMap();
    {

    //                                                                    ================
    // -----------------------------------------------------
    //                                       Column Property
    //                                       ---------------
    protected final Map<String, PropertyGateway> _epgMap = newHashMap();
    {

    //                                                                    ================
    // -----------------------------------------------------
    //                                       Column Property
    //                                       ---------------
    protected final Map<String, PropertyGateway> _epgMap = newHashMap();
    {

    //                                                                    ================
    // -----------------------------------------------------
    //                                       Column Property
    //                                       ---------------
    protected final Map<String, PropertyGateway> _epgMap = newHashMap();
    {

     * @param lineNumber The one-based index of the line containing the problem or {@code -1} if unknown.
     * @param columnNumber The one-based index of the column containing the problem or {@code -1} if unknown.
     * @param exception The exception that caused this problem, may be {@code null}.
     */
    DefaultProblem(

    Al tener el tipo como `int | None`, SQLModel sabrá que esta columna debe ser un `INTEGER` en la base de datos SQL y que debe ser `NULLABLE`.

* `Field(index=True)` le dice a SQLModel que debe crear un **índice SQL** para esta columna, lo que permitirá búsquedas más rápidas en la base de datos cuando se lean datos filtrados por esta columna.

    SQLModel sabrá que algo declarado como `str` será una columna SQL de tipo `TEXT` (o `VARCHAR`, dependiendo de la base de datos).

    assertEquals(ImmutableSet.of(immutableCell('a', 1, "blah")), testTable.cellSet());
  }

  public void testColumn() {
    assertEquals(ImmutableMap.of(), testTable.column(0));
    assertEquals(ImmutableMap.of('a', "blah"), testTable.column(1));
  }

  public void testColumnKeySet() {
    assertEquals(ImmutableSet.of(1), testTable.columnKeySet());
  }

  public void testColumnMap() {