Changes to Get Custom Fields

the response property data/items/default became nullable for the status 200

the response property data/items/hint became nullable for the status 200

the response property data/items/options became nullable for the status 200

the response property data/items/placeholder became nullable for the status 200

the response property data/items/regex became nullable for the status 200

the response property links/items/url became nullable for the status 200

the response property next_page_url became nullable for the status 200

the response property prev_page_url became nullable for the status 200

added the optional property links/items/page to the response with the 200 status