MasterPress 1.3.1 is a compatibility release for PHP 8 and WordPress 5.7. It still remains backwards compatible with older PHP versions.
MPFT_RelatedPostType :: iterator_items()
Implements iterator_items to allow the selected post types to be iterated with a foreach on the field object. If the field does not allow multiple values, this will simply be a collection of one post type.
Note: This method is intended for internal use and should not be called directly.