/**
* Removes the specified progress listener from the list of progress listeners receiving updates
* about this transfer's progress.
*
* @param listener The progress listener to remove.
*/
public synchronized void removeProgressListener(ProgressListener listener) {
progressListenerChain.removeProgressListener(listener);
}
/**
* Adds the specified progress listener to the list of listeners receiving updates about this
* transfer's progress.
*
* @param listener The progress listener to add.
*/
public synchronized void addProgressListener(ProgressListener listener) {
progressListenerChain.addProgressListener(listener);
}