event is optional
event is optional

chrismbarr/DefinitelyTyped,smrq/DefinitelyTyped,scriby/DefinitelyTyped,syuilo/DefinitelyTyped,damianog/DefinitelyTyped,sledorze/DefinitelyTyped,georgemarshall/DefinitelyTyped,pocesar/DefinitelyTyped,borisyankov/DefinitelyTyped,subash-a/DefinitelyTyped,aciccarello/DefinitelyTyped,shlomiassaf/DefinitelyTyped,danfma/DefinitelyTyped,magny/DefinitelyTyped,aciccarello/DefinitelyTyped,borisyankov/DefinitelyTyped,subash-a/DefinitelyTyped,markogresak/DefinitelyTyped,benishouga/DefinitelyTyped,AbraaoAlves/DefinitelyTyped,chrootsu/DefinitelyTyped,martinduparc/DefinitelyTyped,dsebastien/DefinitelyTyped,HPFOD/DefinitelyTyped,rcchen/DefinitelyTyped,AgentME/DefinitelyTyped,arusakov/DefinitelyTyped,sledorze/DefinitelyTyped,QuatroCode/DefinitelyTyped,nycdotnet/DefinitelyTyped,amir-arad/DefinitelyTyped,shlomiassaf/DefinitelyTyped,martinduparc/DefinitelyTyped,isman-usoh/DefinitelyTyped,use-strict/DefinitelyTyped,benliddicott/DefinitelyTyped,jimthedev/DefinitelyTyped,AbraaoAlves/DefinitelyTyped,HPFOD/DefinitelyTyped,scriby/DefinitelyTyped,chrismbarr/DefinitelyTyped,progre/DefinitelyTyped,schmuli/DefinitelyTyped,martinduparc/DefinitelyTyped,alvarorahul/DefinitelyTyped,alexdresko/DefinitelyTyped,isman-usoh/DefinitelyTyped,slavomirvojacek/DefinitelyTyped,YousefED/DefinitelyTyped,psnider/DefinitelyTyped,magny/DefinitelyTyped,abbasmhd/DefinitelyTyped,minodisk/DefinitelyTyped,yuit/DefinitelyTyped,aciccarello/DefinitelyTyped,zuzusik/DefinitelyTyped,GiedriusGrabauskas/DefinitelyTyped,syuilo/DefinitelyTyped,mcrawshaw/DefinitelyTyped,chrootsu/DefinitelyTyped,QuatroCode/DefinitelyTyped,alvarorahul/DefinitelyTyped,mcliment/DefinitelyTyped,damianog/DefinitelyTyped,rolandzwaga/DefinitelyTyped,yuit/DefinitelyTyped,zuzusik/DefinitelyTyped,minodisk/DefinitelyTyped,hellopao/DefinitelyTyped,YousefED/DefinitelyTyped,johan-gorter/DefinitelyTyped,pocesar/DefinitelyTyped,daptiv/DefinitelyTyped,benishouga/DefinitelyTyped,hellopao/DefinitelyTyped,hellopao/DefinitelyTyped,schmuli/DefinitelyTyped,ashwinr/DefinitelyTyped,georgemarshall/DefinitelyTyped,AgentME/DefinitelyTyped,laurentiustamate94/DefinitelyTyped,johan-gorter/DefinitelyTyped,jimthedev/DefinitelyTyped,AbraaoAlves/DefinitelyTyped,AgentME/DefinitelyTyped,psnider/DefinitelyTyped,abbasmhd/DefinitelyTyped,georgemarshall/DefinitelyTyped,benishouga/DefinitelyTyped,danfma/DefinitelyTyped,nycdotnet/DefinitelyTyped,mcrawshaw/DefinitelyTyped,rcchen/DefinitelyTyped,smrq/DefinitelyTyped,progre/DefinitelyTyped,GiedriusGrabauskas/DefinitelyTyped,AgentME/DefinitelyTyped,rolandzwaga/DefinitelyTyped,dsebastien/DefinitelyTyped,psnider/DefinitelyTyped,zuzusik/DefinitelyTyped,slavomirvojacek/DefinitelyTyped,one-pieces/DefinitelyTyped,jimthedev/DefinitelyTyped,use-strict/DefinitelyTyped,arusakov/DefinitelyTyped,ashwinr/DefinitelyTyped,schmuli/DefinitelyTyped,georgemarshall/DefinitelyTyped,micurs/DefinitelyTyped,pocesar/DefinitelyTyped,arusakov/DefinitelyTyped,alexdresko/DefinitelyTyped