public static function create_post_type() {
			// creates a custom post type that will be used by this plugin.
			register_post_type(
				INVP::POST_TYPE,
				apply_filters(
					'invp_post_type_args',
					array(
						'capability_type' => INVP::POST_TYPE,
						'map_meta_cap'    => true,
						'description'     => __( 'Vehicles for sale', 'inventory-presser' ),
						'has_archive'     => true,
						'hierarchical'    => false,
						'labels'          => array(
							'name'                  => _x( 'Vehicles', 'Post type general name', 'inventory-presser' ),
							'singular_name'         => _x( 'Vehicle', 'Post type singular name', 'inventory-presser' ),
							'menu_name'             => _x( 'Vehicles', 'Admin Menu text', 'inventory-presser' ),
							'name_admin_bar'        => _x( 'Vehicle', 'Add New on Toolbar', 'inventory-presser' ),
							'add_new'               => __( 'Add New', 'inventory-presser' ),
							'add_new_item'          => __( 'Add New Vehicle', 'inventory-presser' ),
							'new_item'              => __( 'New Vehicle', 'inventory-presser' ),
							'edit_item'             => __( 'Edit Vehicle', 'inventory-presser' ),
							'view_item'             => __( 'View Vehicle', 'inventory-presser' ),
							'all_items'             => __( 'All Vehicles', 'inventory-presser' ),
							'search_items'          => __( 'Search Vehicles', 'inventory-presser' ),
							'parent_item_colon'     => __( 'Parent Vehicles:', 'inventory-presser' ),
							'not_found'             => __( 'No vehicles found.', 'inventory-presser' ),
							'not_found_in_trash'    => __( 'No vehicles found in Trash.', 'inventory-presser' ),
							'archives'              => _x( 'Inventory', 'The post type archive label used in nav menus. Default “Post Archives”. Added in 4.4', 'inventory-presser' ),
							'insert_into_item'      => _x( 'Attach to vehicle', 'Overrides the “Insert into post”/”Insert into page” phrase (used when inserting media into a post). Added in 4.4', 'inventory-presser' ),
							'uploaded_to_this_item' => _x( 'Uploaded to this vehicle', 'Overrides the “Uploaded to this post”/”Uploaded to this page” phrase (used when viewing media attached to a post). Added in 4.4', 'inventory-presser' ),
							'filter_items_list'     => _x( 'Filter vehicles list', 'Screen reader text for the filter links heading on the post type listing screen. Default “Filter posts list”/”Filter pages list”. Added in 4.4', 'inventory-presser' ),
							'items_list_navigation' => _x( 'Vehicles list navigation', 'Screen reader text for the pagination heading on the post type listing screen. Default “Posts list navigation”/”Pages list navigation”. Added in 4.4', 'inventory-presser' ),
							'items_list'            => _x( 'Vehicles list', 'Screen reader text for the items list heading on the post type listing screen. Default “Posts list”/”Pages list”. Added in 4.4', 'inventory-presser' ),
						),
						'menu_icon'       => 'dashicons-admin-network',
						'menu_position'   => 5, // below Posts.
						'public'          => true,
						'rest_base'       => 'inventory',
						'rewrite'         => array(
							'slug'       => 'inventory',
							'with_front' => false,
						),
						'show_in_rest'    => true,
						'supports'        => array(
							'custom-fields',
							'editor',
							'title',
							'thumbnail',
						),
						'taxonomies'      => Inventory_Presser_Taxonomies::query_vars_array(),
					)
				)
			);
		}