nction load_module_file( $file, $modules = ':all', callable $process = null ) {
		$self = self::get_instance();

		if ( ':all' === $modules ) {
			$modules = self::get_available_modules();
		} elseif ( ':active' === $modules ) {
			$modules = self::get_active_modules_to_run();
		} elseif ( is_string( $modules ) ) {
			$modules = array( $modules );
		} elseif ( ! is_array( $modules ) ) {
			return false;
		}

		foreach ( $modules as $module ) {
			if ( empty( $self->_module_paths[ $module ] ) ) {
				continue;
			}

			$self->load_container_definitions( $module );
			$returned = null;

			if ( self::get_container()->has( "module.{$module}.files" ) ) {
				$files = self::get_container()->get( "module.{$module}.files" );

				if ( isset( $files[ $file ] ) ) {
					$returned = $files[ $file ];
				}
			}

			if ( ! $returned ) {
				$path = "{$self->_module_paths[$module]}/{$file}";

				if ( ! file_exists( $path ) ) {
					continue;
				}

				if ( array_key_exists( $path, $self->returned_files ) ) {
					$returned = $self->returned_files[ $path ];
				} else {
					$returned = include_once( $path );
					$self->returned_files[ $path ] = $returned;
				}
			}

			if ( $returned ) {
				if ( $process ) {
					$process( $returned, $module );
				} else {
					$self->run( $returned );
				}
			}
		}

		return true;
	}

	/**
	 * Get a list of the active modules to run.
	 *
	 * @return string[]
	 */
	protected static function get_active_modules_to_run() {
		if ( ITSEC_Core::is_temp_disable_modules_set() ) {
			$modules = array();
		} else {
			$modules = self::get_active_modules();
		}

		$modules = array_merge( $modules, array_keys( self::get_instance()->_always_active_modules ) );
		$modules = array_unique( $modules );

		return $modules;
	}

	/**
	 * Fires an action to begin the registration of modules.
	 */
	public static function init_modules() {
		do_action( 'itsec-register-modules' );
	}

	/**
	 * Initialize the container.
	 */
	public static function initialize_container() {
		$load = require __DIR__ . '/container.php';

		if ( is_callable( $load ) && ! self::get_instance()->initialized_container ) {
			$load( self::get_instance()->pimple );
		}

		foreach ( self::get_active_modules_to_run() as $module ) {
			self::get_instance()->load_container_definitions( $module );
		}

		self::get_instance()->initialized_container = true;
	}

	/**
	 * Load and run all active modules.
	 */
	public static function run_active_modules() {
		self::initialize_container();
		// The active.php file is for code that will only run when the module is active.
		self::load_module_file( 'active.php', ':active' );
	}

	/**
	 * Run the activation routine for all registered modules.
	 */
	public function run_activation() {
		self::load_module_file( 'setup.php' );

		do_action( 'itsec_modules_do_plugin_activation' );
	}

	/**
	 * Run the deactivation routine for all registered modules.
	 */
	public function run_deactivation() {
		self::load_module_file( 'setup.php' );

		do_action( 'itsec_modules_do_plugin_deactivation' );
	}

	/**
	 * Run the uninstall routine for all registered modules.
	 */
	public static function run_uninstall() {
		self::load_module_file( 'setup.php' );

		do_action( 'itsec_modules_do_plugin_uninstall' );
	}

	/**
	 * Run the upgrade routine for all registered modules.
	 *
	 * @param int $old_version
	 * @param int $new_version
	 */
	public function run_upgrade( $old_version, $new_version ) {
		self::load_module_file( 'setup.php' );

		do_action( 'itsec_modules_do_plugin_upgrade', $old_version, $new_version );
	}

	/**
	 * Get the container.
	 *
	 * @return \Psr\Container\ContainerInterface
	 */
	public static function get_container() {
		if ( ! self::get_instance()->initialized_container ) {
			self::initialize_container();
		}

		return self::get_instance()->container;
	}

	/**
	 * Load the settings controller for all registered modules.
	 *
	 * This function can only be run once per-request.
	 */
	public function load_settings_page() {
		if ( $this->_settings_files_loaded ) {
			return;
		}

		self::load_module_file( 'settings-page.php' );

		$this->_settings_files_loaded = true;
	}

	/**
	 * Get labels for a module.
	 *
	 * @param string $module
	 *
	 * @return array
	 */
	public static function get_labels( $module ) {
		if ( ! isset( self::get_instance()->labels[ $module ] ) ) {
			self::get_instance()->labels[ $module ] = [];
			self::load_module_file( 'labels.php', $module, function ( $labels, $module ) {
				if ( is_array( $labels ) ) {
					self::get_instance()->labels[ $module ] = $labels;
				}
			} );
		}

		return self::get_instance()->labels[ $module ];
	}

	private function run( $definition ) {
		if ( $definition && is_string( $definition ) ) {
			$object = $this->container->get( $definition );

			if ( $object instanceof Runnable ) {
				$object->run();
			}
		}
	}

	/**
	 * Load the container definitions for a module.
	 *
	 * @param string $module
	 */
	private function load_container_definitions( $module ) {
		if ( ! isset( $this->loaded_containers[ $module ] ) && isset( $this->_module_paths[ $module ] ) ) {
			$path = $this->_module_paths[ $module ] . '/container.php';

			if ( file_exists( $this->_module_paths[ $module ] . '/container.php' ) && $register = include( $path ) ) {
				$this->loaded_containers[ $module ] = true;
				$register( $this->pimple );
			} else {
				$this->loaded_containers[ $module ] = false;
			}
		}
	}
}

ITSEC_Modules::get_instance();