console.log grouped

/**
 * Console.log with call location and grouping to reduce log noise.
 * Apply directly to code once.
 * 
 * Original: http://remysharp.com/2014/05/23/where-is-that-console-log/
 */
var groupable = typeof console.groupCollapsed !== 'undefined';
['log', 'warn'].forEach(function(method) {
  var old = console[method];
  console[method] = function() {
    var stack = (new Error()).stack.split(/\n/);

    // Chrome includes a single "Error" line, FF doesn't.
    if (stack[0].indexOf('Error') === 0) {
      stack = stack.slice(1);
    }
    var args = [].slice.apply(arguments).concat([stack[1].trim()]);
    if (groupable) {
      console.groupCollapsed.apply(console, arguments);
      var ret = old.call(console, stack[1].trim());
      console.groupEnd();
      return ret;
    } else {
      return old.apply(console, args);
    }
  };
};