utils_chat_queriesChatQueries constructormessageSentToDirectChatsubscription propertyOn this pagemessageSentToDirectChatsubscription property String messageSentToDirectChatsubscription Implementation String get messageSentToDirectChatsubscription => ''' subscription{ messageSentToDirectChat{ _id messageContent sender { _id firstName image } receiver { _id firstName image } } }''';