code: function() {
          var me = this,
              invalid;
          Ext.suspendLayouts();
          invalid = me.getFields().filterBy(function(field) {
              return !field.validate();
          });
          Ext.resumeLayouts(true);
          return invalid.length < 1;
      }
docs: Returns true if client-side validation on the form is successful. Any invalid fields will be
  marked as invalid. If you only want to determine overall form validity without marking anything,
  use {@link #hasInvalidField} instead.
  @return {Boolean}