Ensure `Event.extend` returns the event.
Ensure `Event.extend` returns the event.
baiyanghese/prototype,lamsieuquay/prototype,Gargaj/prototype,292388900/prototype,sdumitriu/prototype,ldf7801528/prototype,sdumitriu/prototype,ldf7801528/prototype,lamsieuquay/prototype,loduis/prototype,lamsieuquay/prototype,ridixcr/prototype,sstephenson/prototype,baiyanghese/prototype,Jiasm/prototype,sstephenson/prototype,erpframework/prototype,Gargaj/prototype,ShefronYudy/prototype,fashionsun/prototype,Jiasm/prototype,292388900/prototype,sstephenson/prototype,leafo/prototype,Jiasm/prototype,sdumitriu/prototype,leafo/prototype,loduis/prototype,Gargaj/prototype,fashionsun/prototype,loduis/prototype,ShefronYudy/prototype,fashionsun/prototype,ridixcr/prototype,ShefronYudy/prototype,erpframework/prototype,ldf7801528/prototype,292388900/prototype,erpframework/prototype,ridixcr/prototype