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.
MEOW_FieldSet :: offsetGet( String $name )
An implementation of the offsetGet method of PHP’s ArrayAccess interface. This method implementation allows associative array-style offset access to this object (see example).
Note: This is not intended to be called directly.