## Una *instance* "callable" { #a-callable-instance }

En Python hay una forma de hacer que una instance de una clase sea un "callable".

No la clase en sí (que ya es un callable), sino una instance de esa clase.

Para hacer eso, declaramos un método `__call__`:

{* ../../docs_src/dependencies/tutorial011_an_py310.py hl[12] *}

     * as of Animal Sniffer 1.24. Maybe Animal Sniffer processes this nested class before it
     * processes Streams and thus hasn't had a chance to see Streams's annotation?
     */
    @IgnoreJRERequirement
    final class WithCharacteristics implements Spliterator<T> {
      private final Spliterator.OfInt delegate;

      WithCharacteristics(Spliterator.OfInt delegate) {

        }
    }
    
    @Override
    public void close() {
        if (handle != null) {
            try {
                handle.close();
            } catch (Exception e) {
                log.error("Error closing witness RPC handle", e);
            }
        }
    }
    
    // RPC Stub classes for witness operations
    private static class WitnessRegisterStub extends DcerpcMessage {

        new LicenseMatcher("Apache-2.0", true, false, Pattern.compile("Apache.*License.*[vV]ersion.*2\\.0", Pattern.DOTALL)),
        new LicenseMatcher(
            "BSD-2-Clause",
            true,
            false,
            Pattern.compile(
                ("Redistribution and use in source and binary forms, with or without\n"

     *       <td>{@code /home/user/myproject/target/classes}</td>
     *       <td>No explicit path → use output directory</td>
     *     </tr>
     *     <tr>
     *       <td>{@code Optional.of(Path.of("META-INF"))}</td>
     *       <td>{@code /home/user/myproject/target/classes}</td>
     *       <td>{@code /home/user/myproject/target/classes/META-INF}</td>

    }

    // Test convertBooleanQuery with MUST_NOT clause
    @Test
    public void test_convertBooleanQuery_withMustNotClause() {
        BooleanQuery.Builder boolQueryBuilder = new BooleanQuery.Builder();
        TermQuery termQuery = new TermQuery(new Term("field", "value"));
        boolQueryBuilder.add(termQuery, BooleanClause.Occur.MUST_NOT);
        // Add a MUST clause to make the query valid

/**
 * Derived suite generators, split out of the suite builders so that they are available to GWT.
 *
 * @author George van den Driessche
 */
@GwtCompatible
@NullMarked
public final class DerivedCollectionGenerators {
  public static class MapEntrySetGenerator<K extends @Nullable Object, V extends @Nullable Object>
      implements TestSetGenerator<Entry<K, V>>, DerivedGenerator {

        assertNotNull(credential);
        assertEquals("entraiduser", ((TestLoginCredential) credential).username);
    }

    // Helper classes for testing
    private static class TestLoginCredential implements LoginCredential {
        private final String username;

        public TestLoginCredential(String username) {
            this.username = username;
        }

        // TODO - rename some incubating types to remove collisions and then remove these exclusions
        excludedPackages.add("org.gradle.plugins.binaries.model");

        // Exclude classes that were moved in a different package but the deprecated ones are not removed yet
        excludedPackages.add("org.gradle.platform.base.test");
        return excludedPackages;
    }

 * appropriate primitive specialization such as {@code ToIntFunction}) instead whenever possible.
 * Otherwise, at least reduce <i>explicit</i> dependencies on this type by using lambda expressions
 * or method references instead of classes, leaving your code easier to migrate in the future.
 *
 * <p>To use an existing function (say, named {@code function}) in a context where the <i>other