function(user, overwrite){
            var uid = user.identifier, ow = overwrite || false;
            if(!!uid){
                if(!this.users[uid] || !!ow){
                    this.users[uid] = user;
                }
            }
        }
function(user, overwrite){
            var uid = user.identifier, ow = overwrite || false;
            if(!!uid){
                if(!this.users[uid] || !!ow){
                    this.users[uid] = user;
                }
            }
        }
function ( user , overwrite ) { var uid = user . identifier , ow = overwrite || false ; if ( ! ! uid ) { if ( ! this . users [ uid ] || ! ! ow ) { this . users [ uid ] = user ; } } }
other helpers
other helpers