Rubenz Query Filter by Category

add_filter( 'arts/elementor/rubenz_widget_portfolio_fullscreen_headings_slider/query_args', 'custom_rubenz_widget_portfolio_fullscreen_headings_slider_query_args' );
function custom_rubenz_widget_portfolio_fullscreen_headings_slider_query_args( $args ) {

  $args = array(
    'tax_query' => array(
      array(
        'taxonomy' => 'arts_portfolio_category',
        'field'    => 'slug',
        'terms'    => array( 'design' ), // include only posts of the current categories (slugs)
      ),
    ),
  );

  return $args;

}