analytics.js
function handler () {
  for (var i = 0, fn; fn = callbacks[i]; i++) fn.apply(this, arguments);
}
function handler () {
  for (var i = 0, fn; fn = callbacks[i]; i++) fn.apply(this, arguments);
}
function handler ( ) { for ( var i = 0 , fn ; fn = callbacks [ i ] ; i ++ ) fn . apply ( this , arguments ) ; }
Error handler.
Error handler .