question: private Usage createTalkUsage ( Context context ) { if ( talkUsage != null ) { return talkUsage ; } TypeToken < List < Usage > > token = new TypeToken < List < Usage > > ( ) { } ; List < Usage > initTalkIO = JsonUtils . parseJsonFile ( context , "talk_io.json" , token ) ; talkUsage = initTalkIO . get ( 0 ) ; return talkUsage ; }
target:  Get talk incoming/outgoing info from the json file and save in cache