Bug 29163 SafeRunnable needs to be accessible in JFace
We need to be able to access the SafeRunnable in JFace in order that some error protection can be added to preferences and properties dialogs.
bundles/org.eclipse.ui.workbench/extensions/org/eclipse/jface/dialogs/ErrorDialog.java
if (children == null || children.length == 0) {
			return status.matches(mask);
		}
		for (int i = 0; i < children.length; i++) {
			if (children[i].matches(mask))
				return true;
		}
		return false;
	}
	/**
	 * Toggles the unfolding of the details area.  This is triggered by
	 * the user pressing the details button.
	 */
	private void toggleDetailsArea() {
		Point windowSize = getShell().getSize();
		Point oldSize = getShell().computeSize(SWT.DEFAULT, SWT.DEFAULT);
		if (listCreated) {
			list.dispose();
			listCreated = false;
			detailsButton.setText(IDialogConstants.SHOW_DETAILS_LABEL);
		} else {
			list = createDropDownList((Composite) getContents());
			detailsButton.setText(IDialogConstants.HIDE_DETAILS_LABEL);
		}
		Point newSize = getShell().computeSize(SWT.DEFAULT, SWT.DEFAULT);
		getShell().setSize(
			new Point(windowSize.x, windowSize.y + (newSize.y - oldSize.y)));
	}
}