Bug 184602 [Progress] "Widget is disposed" when setting builders twice during build
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/ProgressMonitorDialog.java
* @since 3.0
	 */
	protected void finishedRun() {
		decrementNestingDepth();
		close();
	}
	/**
	 * Sets whether the progress dialog is cancelable or not.
	 * 
	 * @param cancelable
	 *            <code>true</code> if the end user can cancel this progress
	 *            dialog, and <code>false</code> if it cannot be canceled
	 */
	public void setCancelable(boolean cancelable) {
		if (cancel == null) {
			enableCancelButton = cancelable;
		} else {
			asyncSetOperationCancelButtonEnabled(cancelable);
		}
	}
	/**
	 * Helper to enable/disable Cancel button for this dialog.
	 * 
	 * @param b
	 *            <code>true</code> to enable the cancel button, and
	 *            <code>false</code> to disable it
	 * @since 3.0
	 */
	protected void setOperationCancelButtonEnabled(boolean b) {
		operationCancelableState = b;