Bug 49182 What should canceling setRawClasspath do ?
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/viewsupport/GoToBackProgressMonitorDialog.java
/**
 * Decrements the nesting depth of running operations.
 * @since 3.0
 *
 */
protected void decrementNestingDepth() {
	nestingDepth--;
}
/**
 * Called just before the operation is run.
 * Default behaviour is to open or create the dialog,
 * based on the setting of <code>getOpenOnRun</code>,
 * and increment the nesting depth.
 * @since 3.0
 */
protected void aboutToRun() {
	if (getOpenOnRun()) {
		open();
	}
	else {
		create();
	}
	incrementNestingDepth();
}
/**
 * Called just after the operation is run.
 * Default behaviour is to decrement the nesting depth,
 * and close the dialog.
 * @since 3.0
 */