code: function() {
          var me = this,
              doc = document,
              toRun = me.toRun || me.tests,
              n = toRun.length,
              div = n && Ext.isReady && doc.createElement('div'),
              notRun = [],
              browserKey = getBrowserKey(),
              test, vector, value;
  
          if (div) {
              div.innerHTML = [
                  '<div style="height:30px;width:50px;">',
                      '<div style="height:20px;width:20px;"></div>',
                  '</div>',
                  '<div style="width: 200px; height: 200px; position: relative; padding: 5px;">',
                      '<div style="position: absolute; top: 0; left: 0; width: 100%; height: 100%;"></div>',
                  '</div>',
                  '<div style="position: absolute; left: 10%; top: 10%;"></div>',
                  '<div style="float:left; background-color:transparent;"></div>'
              ].join('');
  
              doc.body.appendChild(div);
          }
  
          vector = supportsVectors[browserKey];
          while (n--) {
              test = toRun[n];
              value = vector && vector[n];
              if (value !== undefined) {
                  me[test.identity] = value;
              } else if (div || test.early) {
                  me[test.identity] = test.fn.call(me, doc, div);
              } else {
                  notRun.push(test);
              }
          }
  
          if (div) {
              doc.body.removeChild(div);
          }
  
          me.toRun = notRun;
      }
docs: Runs feature detection routines and sets the various flags. This is called when
  the scripts loads (very early) and again at {@link Ext#onReady}. Some detections
  are flagged as `early` and run immediately. Others that require the document body
  will not run until ready.
  
  Each test is run only once, so calling this method from an onReady function is safe
  and ensures that all flags have been set.
  @markdown
  @private