Bug 157174 [Viewers] Refactor new Viewer API
We are yet not completely happy with the API and refactor it.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ViewerLabelProvider.java
/**
	 * Get the IFontProvider for the receiver.
	 * 
	 * @return {@link IFontProvider} or <code>null</code>
	 */
	public IFontProvider getFontProvider() {
		return fontProvider;
	}
	/**
	 * Return the label provider for the receiver.
	 * 
	 * @return {@link ILabelProvider}
	 */
	public ILabelProvider getLabelProvider() {
		return labelProvider;
	}
	/**
	 * Get the image displayed in the tool tip for object.
	 * 
	 * @param object
	 *            the element for which the tool tip is shown
	 * @return {@link Image} or <code>null</code> if there is not image.
	 */
	public Image getToolTipImage(Object object) {
		return null;
	}
	/**
	 * Returns the tool tip text for the given element and column index, or
	 * <code>null</code> if a custom tool tip should not be displayed.
	 *