code: function ___$insertStyle(css) {
    if (!css) {
      return;
    }
    if (typeof window === 'undefined') {
      return;
    }
  
    var style = document.createElement('style');
  
    style.setAttribute('type', 'text/css');
    style.innerHTML = css;
    document.head.appendChild(style);
  
    return css;
  }
docs: dat-gui JavaScript Controller Library
  http://code.google.com/p/dat-gui
  
  Copyright 2011 Data Arts Team, Google Creative Lab
  
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  
  http://www.apache.org/licenses/LICENSE-2.0