externs: add type for onMutation callback
externs: add type for onMutation callback
zxs0827/polymer,yangjae/polymer,gronke/polymer,mgiuffrida/polymer,Zagorakiss/polymer,simonfan/polymer,BrianLTJ/polymer,ktiedt/polymer,pacificIT/polymer,Kabele/polymer,tekjava/polymer,ilovezy/polymer,cgvarela/polymer,kristianmandrup/polymer,tekjava/polymer,TedaLIEz/polymer,exlerdesigns/polymer,chimpinano/polymer,fjkfwz/polymer,jpalomar/polymer,jscissr/polymer,jordanyaker/polymer,jordanyaker/polymer,MartinsThiago/polymer,HiWong/polymer,cbmeeks/polymer,Litor/polymer,udhayam/polymer,samccone/polymer,fjkfwz/polymer,jscissr/polymer,ktiedt/polymer,yforrest/polymer,Kabele/polymer,ThiagoGarciaAlves/polymer,ThiagoGarciaAlves/polymer,Endika/polymer,kristianmandrup/polymer,elkamel/polymer,Litor/polymer,cgvarela/polymer,Zagorakiss/polymer,simo97/polymer,elkamel/polymer,ilovezy/polymer,udhayam/polymer,simo97/polymer,ikeagold/polymer,rafaelducati/polymer,marcus7777/polymer,simonsoft/polymer,carbono-io/polymer,mgiuffrida/polymer,MartinsThiago/polymer,pacificIT/polymer,yforrest/polymer,dalong123/polymer,bright-sparks/polymer,chimpinano/polymer,thiagolucio/polymer,akintoey/polymer,gronke/polymer,gazal-k/polymer,sekiyaeiji/polymer,henrylee2cn/polymer,MetaMemoryT/polymer,JsonChiu/polymer,Endika/polymer,carbono-io/polymer,pacificIT/polymer,mauricionr/polymer,elkamel/polymer,itnirmaan/polymer,Flip120/polymer,cgvarela/polymer,zebMcCorkle/polymer,sekiyaeiji/polymer,YOTOV-LIMITED/polymer,paulballesty/polymer,udhayam/polymer,YOTOV-LIMITED/polymer,TedaLIEz/polymer,MartinMoizard/polymer,ikeagold/polymer,samccone/polymer,leitzler/polymer,itnirmaan/polymer,YOTOV-LIMITED/polymer,dotDeeka/polymer,jpalomar/polymer,JeremybellEU/polymer,filaraujo/polymer,henrylee2cn/polymer,simonfan/polymer,exlerdesigns/polymer,zxs0827/polymer,tjsavage/polymer,jvkops/polymer,youprofit/polymer,ikeagold/polymer,vic/polymer,filaraujo/polymer,jordanyaker/polymer,mauricionr/polymer,studiowangfei/polymer,kristianmandrup/polymer,itnirmaan/polymer,Tudes/polymer,HiWong/polymer,rafaelducati/polymer,BrianLTJ/polymer,thiagolucio/polymer,ankurvr/polymer,mgiuffrida/polymer,tjsavage/polymer,japacible/polymer,tjsavage/polymer,bright-sparks/polymer,Polymer/polymer,simonfan/polymer,JeremybellEU/polymer,jscissr/polymer,vic/polymer,simonsoft/polymer,jforge/polymer,cbmeeks/polymer,M4gn4tor/polymer,dalong123/polymer,gronke/polymer,zxs0827/polymer,M4gn4tor/polymer,jvkops/polymer,jpalomar/polymer,brandonmowat/polymer,studiowangfei/polymer,exlerdesigns/polymer,chimpinano/polymer,youprofit/polymer,akintoey/polymer,dalong123/polymer,jforge/polymer,HiWong/polymer,marcus7777/polymer,yangjae/polymer,thiagolucio/polymer,BrianLTJ/polymer,bright-sparks/polymer,gazal-k/polymer,henrylee2cn/polymer,fjkfwz/polymer,MartinsThiago/polymer,Polymer/polymer,dotDeeka/polymer,japacible/polymer,yforrest/polymer,JsonChiu/polymer,tachyon1337/polymer,akintoey/polymer,paulballesty/polymer,tachyon1337/polymer,Litor/polymer,gazal-k/polymer,carbono-io/polymer,MartinMoizard/polymer,cbmeeks/polymer,simo97/polymer,ankurvr/polymer,filaraujo/polymer,codegist/polymer,zebMcCorkle/polymer,Flip120/polymer,Tudes/polymer,JeremybellEU/polymer,Polymer/polymer,MetaMemoryT/polymer,Endika/polymer,tekjava/polymer,leitzler/polymer,samccone/polymer,jvkops/polymer,brandonmowat/polymer,codegist/polymer,MartinMoizard/polymer,Tudes/polymer,ktiedt/polymer