MasterPress 1.3.1 is a compatibility release for PHP 8 and WordPress 5.7. It still remains backwards compatible with older PHP versions.
MEOW_FieldSetCollection :: has( String $name )
Checks to see if this field set collection has a field by the given name, but also if that field has a value available, returning the field itself if it is available, or boolean false otherwise. This is the most readable way to conditionally output HTML that surrounds a field value.
Note: this method is most appropriate for field sets that allow single items. To check if a multi-item set has values present, you need to call the method on the object one level above (see related methods)