Meta
$available_classes_query = array( 'relation' => 'AND', array( 'key' => 'class-available', 'value' => 'On', 'compare' => '=', ), );
$available_classes_query = array( 'relation' => 'AND', array( 'key' => 'class-available', 'value' => 'On', 'compare' => '=', ), );