Bug 72615 [Viewers] Need and ITableFontProvider
We released an ITabelColorProvider for M2 - we should have a corresponding ITableFontProvider
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/StructuredViewer.java
* resulting array must not be modified, as it may come directly from the
	 * model's internal state.
	 * 
	 * @param parent
	 *            the parent element
	 * @return a sorted and filtered array of child elements
	 */
	protected Object[] getSortedChildren(Object parent) {
		Object[] result = getFilteredChildren(parent);
		if (sorter != null) {
			
			result = (Object[]) result.clone();
			sorter.sort(this, result);
		}
		return result;
	}
	/**
	 * Returns this viewer's sorter, or <code>null</code> if it does not have
	 * one.
	 * 
	 * @return a viewer sorter, or <code>null</code> if none
	 */
	public ViewerSorter getSorter() {
		return sorter;
	}
	/**
	 * Handles a double-click select event from the widget.
	 * <p>
	 * This method is internal to the framework; subclassers should not call
	 * this method.