headers abstract method

Implementation

TRes headers(
    Iterable<Query$getQuestActivitiesByQuest$getQuestActivitiesByQuest$activity$action$definition$api$headers>? Function(
            Iterable<
                CopyWith$Query$getQuestActivitiesByQuest$getQuestActivitiesByQuest$activity$action$definition$api$headers<
                    Query$getQuestActivitiesByQuest$getQuestActivitiesByQuest$activity$action$definition$api$headers>>?)
        _fn);