/**
 * Implementation of {@link Table} using linked hash tables. This guarantees predictable iteration
 * order of the various views.
 *
 * <p>The views returned by {@link #column}, {@link #columnKeySet()}, and {@link #columnMap()} have
 * iterators that don't support {@code remove()}. Otherwise, all optional operations are supported.
 * Null row keys, columns keys, and values are not supported.
 *

      assertEquals(
          ImmutableMap.of(
              1, ImmutableMap.of('a', "foo", 'b', "bar"), 2, ImmutableMap.of('a', "baz")),
          testInstance.columnMap());
    }
  }

  public void testContains() {
    for (ImmutableTable<Character, Integer, String> testInstance : getTestInstances()) {
      assertTrue(testInstance.contains('a', 1));

 * returns a {@link SortedMap}, instead of the {@link Set} and {@link Map} specified by the {@link
 * Table} interface.
 *
 * <p>The views returned by {@link #column}, {@link #columnKeySet()}, and {@link #columnMap()} have
 * iterators that don't support {@code remove()}. Otherwise, all optional operations are supported.
 * Null row keys, columns keys, and values are not supported.
 *

 * returns a {@link SortedMap}, instead of the {@link Set} and {@link Map} specified by the {@link
 * Table} interface.
 *
 * <p>The views returned by {@link #column}, {@link #columnKeySet()}, and {@link #columnMap()} have
 * iterators that don't support {@code remove()}. Otherwise, all optional operations are supported.
 * Null row keys, columns keys, and values are not supported.
 *

    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).

- Parquet API supports columnar compression for  using GZIP, Snappy, LZ4. Whole object compression is not supported for Parquet objects.
- Server-side encryption - The Select API supports querying objects that are protected with server-side encryption.

## Ejecución de dependencias con `yield`

La secuencia de ejecución es más o menos como este diagrama. El tiempo fluye de arriba a abajo. Y cada columna es una de las partes que interactúa o ejecuta código.

```mermaid
sequenceDiagram

participant client as Client
participant handler as Exception handler
participant dep as Dep with yield

uint64 { return (a.hi << (64 - 51)) | (a.lo >> 51) } func feMulGeneric(v, a, b *Element) { a0 := a.l0 a1 := a.l1 a2 := a.l2 a3 := a.l3 a4 := a.l4 b0 := b.l0 b1 := b.l1 b2 := b.l2 b3 := b.l3 b4 := b.l4 // Limb multiplication works like pen-and-paper columnar multiplication, but // with 51-bit limbs instead of digits. // // a4 a3 a2 a1 a0 x // b4 b3 b2 b1 b0 = // ---------- // a4b0 a3b0 a2b0 a1b0 a0b0 + // a4b1 a3b1 a2b1 a1b1 a0b1 + // a4b2 a3b2 a2b2 a1b2 a0b2 + // a4b3 a3b3 a2b3 a1b3 a0b3 + // a4b4 a3b4...