Example implementation for Event_Manager and dynamic priority

<php
/**
 * Class description
 */
class My_Class implements Subscriber_Interface {

	/**
	 * Returns an array of hooks that this subscriber wants to register with
	 * the WordPress plugin API.
	 *
	 * @hooked italystrap_entry_content - 10
	 *
	 * @return array
	 */
	public static function get_subscribed_events() {

		return array(
			'italystrap_entry_content'	=> array(
				'function_to_add'			=> 'render',
				'priority'				=> apply_filters( 'italystrap_my_class_priority', 10 ),
			),
		);
	}

	/**
	 * Render the output of the controller.
	 */
	public function render() {

		// Do somethings
	}
}



/**
 * The implementation
 */
 $registered_classes = array(
	'Another_Class'		=> '\ItalyStrap\Another_Class',
	'My_Class'			=> array(
		'\ItalyStrap\My_CLass',
		40, // This is the new priority
	),
);

foreach ( $registered_classes as $class_name => $value ) {

	$class_name = strtolower( $class_name );
	$prefixed_classname = "italystrap_{$class_name}";

	if ( is_array( $value ) ) {
		add_filter( "italystrap_{$class_name}_priority", function ( $priority ) use ( $value ) {
			if ( ! isset( $value[1] ) ) {
				return $priority;
			}
			return $value[1];
		});

		$value = $value[0];
	}

	$$prefixed_classname = $injector->make( $value ); // Auryn PHP DIC
	$event_manager->add_subscriber( $$prefixed_classname );
}