pods-framework / pods

            $ignore = array( 'attachment', 'revision', 'nav_menu_item' );

            foreach ( $post_types as $post_type => $label ) {

                if ( in_array( $post_type, $ignore ) || empty( $post_type ) ) {

                    unset( $post_types[ $post_type ] );

                    continue;

                }

                elseif ( 0 === strpos( $post_type, '_pods_' ) && apply_filters( 'pods_pick_ignore_internal', true ) ) {

                    unset( $post_types[ $post_type ] );

                    continue;

                }

                $post_type = get_post_type_object( $post_type );

                self::$related_objects[ 'post_type-' . $post_type->name ] = array(

                    'label' => $post_type->label . ' (' . $post_type->name . ')',

                    'group' => __( 'Post Types', 'pods' ),

                    'bidirectional' => true

                );

            }

            // Taxonomies

            $taxonomies = get_taxonomies();

            $ignore = array( 'nav_menu', 'post_format' );

            foreach ( $taxonomies as $taxonomy => $label ) {

                if ( in_array( $taxonomy, $ignore ) || empty( $taxonomy ) ) {

                    unset( $taxonomies[ $taxonomy ] );

                    continue;

                }

				/**

				 * Prevent ability to extend core Pods content types.

				 *

				 * @param bool. Default is true, when set to false Pods internal content types can not be extended.

				 *

				 * @since 2.3.19

				 */

				elseif ( 0 === strpos( $taxonomy, '_pods_' ) && apply_filters( 'pods_pick_ignore_internal', true ) ) {

                    unset( $taxonomies[ $taxonomy ] );

                    continue;

                }

                $taxonomy = get_taxonomy( $taxonomy );

                self::$related_objects[ 'taxonomy-' . $taxonomy->name ] = array(

                    'label' => $taxonomy->label . ' (' . $taxonomy->name . ')',

                    'group' => __( 'Taxonomies', 'pods' ),

                    'bidirectional' => true

                );

            }

            // Other WP Objects

            self::$related_objects[ 'user' ] = array(