postbox_classes_{$screen_id}_{$box_id}

apply_filters('postbox_classes_{$screen_id}_{$box_id}') is found 1 times:

• /wp-admin/includes/post.php line 1430

  	 * @since 3.2.0
  	 *
  	 * @param string[] $classes An array of postbox classes.
  	 */
  	$classes = apply_filters( "postbox_classes_{$screen_id}_{$box_id}", $classes );
  
  	return implode( ' ', $classes );
  }
  
  /**
   * Returns a sample permalink based on the post name.
  

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