code: function(obj) {
          var fields = this.getFields().items,
              f,
              fLen   = fields.length;
  
          for (f = 0; f < fLen; f++) {
              Ext.apply(fields[f], obj);
          }
  
          return this;
      }
docs: Calls {@link Ext#apply Ext.apply} for all fields in this form with the passed object.
  @param {Object} obj The object to be applied
  @return {Ext.form.Basic} this