* depending on the Ext JS toolkit being used (or Sencha Touch), which may produce unexpected results* depending on the Ext JS toolkit being used (or Sencha Touch), which may produce unexpected results* depending on the Ext JS toolkit being used (or Sencha Touch), which may produce unexpected results* depending on the Ext JS toolkit being used (or Sencha Touch), which may produce unexpected results* This class provides methods specific to Ext JS TextField (`Ext.form.field.Text` or `Ext.field.Text`).* data.record. Modifications of the record data may be reflected in the copy on the future instance.