public function __construct() {

		foreach ( $this->post_types as $post_type ) {
			add_filter( 'manage_' . $post_type . '_posts_columns', array( $this, 'add_columns' ), 10, 1 );
			add_action( 'manage_' . $post_type . '_posts_custom_column', array( $this, 'manage_columns' ), 10, 2 );
			add_filter( 'views_edit-' . $post_type, array( $this, 'get_views' ), 777, 1 );
		}

		add_action( 'pre_get_posts', array( $this, 'pre_get_posts' ) );

	}