Masterpress 1.3.6 is a compatibility release. It resolves an edge case with shared fieldsets not working for MySQL 8 when the fieldset is limited to more than 1 post type or taxonomy or excluding any post types or taxonomies.
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.