LearnDash_Settings_Metabox_Quiz_Admin_Data_Handling_Settings::custom_fields_forms_get_callback()
Method: Get Pro Quiz custom fields data for REST API.
@package: LearnDash / Settings / Metaboxes
Source Files: includes/settings/settings-metaboxes/class-ld-settings-metabox-quiz-admin-data-handling-settings.php