public static function set_default_settings() {
			$settings = INVP::settings();
			// Do not overwrite taxonomies setting if it exists.
			if ( ! empty( $settings['taxonomies'] ) ) {
				return;
			}

			// If the old show_all_taxonomies is set, maintain that behavior.
			$show_menu = false;
			if ( isset( $settings['show_all_taxonomies'] ) ) {
				$show_menu = $settings['show_all_taxonomies'];
				unset( $settings['show_all_taxonomies'] );
			}
			if ( ! isset( $settings['taxonomies'] ) ) {
				$settings['taxonomies'] = Inventory_Presser_Admin_Options::taxonomies_setting_default( $settings );
			}
			update_option( INVP::OPTION_NAME, $settings );
		}