In Python there's a way to make an instance of a class a "callable".

Not the class itself (which is already a callable), but an instance of that class.

To do that, we declare a method `__call__`:

{* ../../docs_src/dependencies/tutorial011_an_py39.py hl[12] *}

    private MavenSession newMavenSession() throws Exception {
        return createMavenSession(null);
    }

    @Override
    protected String getProjectsDirectory() {
        // TODO Auto-generated method stub
        return null;
    }

    public static class Mojo {
        URI uri;
        Path path;
        String uriString;
        String uriAsciiString;
        String pathString;
    }

Entonces, podemos cambiar la dependencia "dependable" `common_parameters` de arriba a la clase `CommonQueryParams`:

{* ../../docs_src/dependencies/tutorial002_an_py310.py hl[11:15] *}

Presta atención al método `__init__` usado para crear la instance de la clase:

{* ../../docs_src/dependencies/tutorial002_an_py310.py hl[12] *}

...tiene los mismos parámetros que nuestros `common_parameters` anteriores:

        assertEquals(mojo.pathString, path.toString());
    }

    @Override
    protected String getProjectsDirectory() {
        // TODO Auto-generated method stub
        return null;
    }

    public static class Mojo {
        URI uri;
        Path path;
        String uriString;
        String uriAsciiString;
        String pathString;
    }

     * {@code profile > project}, hence active profile property may override project property.
     * <p>
     * The caller of this method should decide whether there is a project in scope (hence, a project instance
     * needs to be passed) or not.
     *
     * @param project {@link Project} or {@code null}.

For example, when a Go 1.21 toolchain compiles a program,
if the work module's `go.mod` or the workspace's `go.work`
says `go` `1.20`, then the program defaults to `panicnil=1`,
matching Go 1.20 instead of Go 1.21.

Because this method of setting GODEBUG defaults was introduced only in Go 1.21,
programs listing versions of Go earlier than Go 1.20 are configured to match Go 1.20,
not the older version.

## Agregar la tarea en segundo plano { #add-the-background-task }

Dentro de tu *path operation function*, pasa tu función de tarea al objeto de *background tasks* con el método `.add_task()`:

{* ../../docs_src/background_tasks/tutorial001_py39.py hl[14] *}

`.add_task()` recibe como argumentos:

* Una función de tarea para ejecutar en segundo plano (`write_notification`).

     *         repository).
     */
    File getPomFile();

    /**
     * Sets the POM file of the project to build. Note that providing the path to a POM file via this method will make
     * the model builder operate in project mode. This mode is meant for effective models that are employed during the

    @Inject
    public AbstractUpgradeGoal(StrategyOrchestrator orchestrator) {
        this.orchestrator = orchestrator;
    }

    /**
     * Executes the upgrade goal.
     * Template method that calls doUpgrade and optionally saves modifications.
     */
    @Override
    public int execute(UpgradeContext context) throws Exception {
        UpgradeOptions options = context.options();

            return;
        }

        // Update namespace based on target model version
        String targetNamespace = getNamespaceForModelVersion(targetModelVersion);

        // Use element's attribute method to set the namespace declaration
        // This modifies the element in place and marks it as modified
        root.attribute("xmlns", targetNamespace);
        context.detail("Updated namespace to " + targetNamespace);