// Avia Layout Builder in custom post types

function avf_alb_supported_post_types_mod( array $supported_post_types )
{
  $supported_post_types[] = 'case_studies';
  return $supported_post_types;
}
add_filter('avf_alb_supported_post_types', 'avf_alb_supported_post_types_mod', 10, 1);

function avf_metabox_layout_post_types_mod( array $supported_post_types )
{
 $supported_post_types[] = 'case_studies';
 return $supported_post_types;
}
add_filter('avf_metabox_layout_post_types', 'avf_metabox_layout_post_types_mod', 10, 1);