package Ġorg . covid watch . android . data . contact event . firebase Ċ Ċ object ĠFire store Constants Ġ{ ĊĊĠĠĠ Ġconst Ġval ĠCOL LECTION _ CONTACT _ EVENTS : ĠString Ġ= Ġ" contact _ events " ĊĊĠĠĠ Ġconst Ġval ĠFIELD _ TIMESTAMP : ĠString Ġ= Ġ" timestamp " Ċ }