tokens: Assuming that -downloadImageWithURL : options : progress : completed : method performs image loading on the background thread and returns instantly we can call it without dispatch_async(dispatch_get_main_queue () ... wrapping .
ner_tags: O O B-Function I-Function I-Function I-Function I-Function I-Function I-Function I-Function O O B-User_Interface_Element O O O O O O O O O O O O O B-Code_Block I-Code_Block I-Code_Block O O