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
* them. The resulting array must not be modified, as it may come directly
	 * from the model's internal state.
	 * <p>
	 * Returns an empty array if the given parent is <code>null</code>.
	 * </p>
	 * 
	 * @param parent
	 *            the parent element
	 * @return the child elements
	 */
	protected Object[] getRawChildren(Object parent) {
		Object[] result = null;
		if (parent != null) {
			IStructuredContentProvider cp = (IStructuredContentProvider) getContentProvider();
			if (cp != null) {
				result = cp.getElements(parent);
				assertElementsNotNull(result);
			}
		}
		return (result != null) ? result : new Object[0];
	}
	/**
	 * Returns the root element.
	 * <p>
	 * The default implementation of this framework method forwards to
	 * <code>getInput</code>. Override if the root element is different from
	 * the viewer's input element.
	 * </p>
	 * 
	 * @return the root element, or <code>null</code> if none