_wp_scripts_maybe_doing_it_wrong example

/** * Fires before scripts in the $handles queue are printed. * * @since 2.1.0 */
    do_action( 'wp_print_scripts' );

    if ( '' === $handles ) { // For 'wp_head'.         $handles = false;
    }

    _wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );

    if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
        if ( ! $handles ) {
            return array(); // No need to instantiate if nothing is there.         }
    }

    return wp_scripts()->do_items( $handles );
}

/** * Adds extra code to a registered script. * * Code will only be added if the script is already in the queue. * Accepts a string $data containing the Code. If two or more code blocks * are added to the same script $handle, they will be printed in the order * they were added, i.e. the latter added code can redeclare the previous. * * @since 4.5.0 * * @see WP_Scripts::add_inline_script() * * @param string $handle Name of the script to add the inline script to. * @param string $data String containing the JavaScript to be added. * @param string $position Optional. Whether to add the inline script before the handle * or after. Default 'after'. * @return bool True on success, false on failure. */

    if ( ! $handles ) {
        /** * Fires before styles in the $handles queue are printed. * * @since 2.6.0 */
        do_action( 'wp_print_styles' );
    }

    _wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );

    if ( ! ( $wp_styles instanceof WP_Styles ) ) {
        if ( ! $handles ) {
            return array(); // No need to instantiate if nothing is there.         }
    }

    return wp_styles()->do_items( $handles );
}

/** * Adds extra CSS styles to a registered stylesheet. * * Styles will only be added if the stylesheet is already in the queue. * Accepts a string $data containing the CSS. If two or more CSS code blocks * are added to the same stylesheet $handle, they will be printed in the order * they were added, i.e. the latter added styles can redeclare the previous. * * @see WP_Styles::add_inline_style() * * @since 3.3.0 * * @param string $handle Name of the stylesheet to add the extra styles to. * @param string $data String containing the CSS styles to be added. * @return bool True on success, false on failure. */