* <p>Provides a mechanism to run one or more {@link Ext.data.Operation operations} in a given order. Fires the 'operationcomplete' event
* after the completion of each Operation, and the 'complete' event when all Operations have been successfully executed. Fires an 'exception'
* event if any of the Operations encounter an exception.</p>
* <p>Provides a mechanism to run one or more {@link Ext.data.Operation operations} in a given order. Fires the 'operationcomplete' event
* after the completion of each Operation, and the 'complete' event when all Operations have been successfully executed. Fires an 'exception'
* event if any of the Operations encounter an exception.</p>