Bug 120117 [DataBinding] Need to support images in table cells
bundles/org.eclipse.jface.databinding/src/org/eclipse/jface/databinding/internal/viewers/TableViewerUpdatableCollectionExtended.java
private Object getConvertedValue(Object element, Column column) {
			Object value = getValue(element, column);
			Object convertedValue = column.getConverter().convertModelToTarget(
					value);
			return convertedValue;
		}
		public Image getColumnImage(Object element, int columnIndex) {
			if (columnIndex < tableViewerDescription.getColumnCount()
					&& columnIndex >= 0) {
				Column column = getColumn(columnIndex);
				IConverter converter = column.getConverter();
				if (converter.getTargetType().equals(ViewerLabel.class)) {
					ViewerLabel viewerLabel = (ViewerLabel) getConvertedValue(
							element, column);
					return viewerLabel.getImage();
				}
			}
			return null;
		}
		public String getColumnText(Object element, int columnIndex) {
			Object convertedValue = null;
			if (columnIndex < tableViewerDescription.getColumnCount()
					&& columnIndex >= 0) {
				Column column = getColumn(columnIndex);
				convertedValue = getConvertedValue(element, column);
				IConverter converter = column.getConverter();
				if (converter.getTargetType().equals(ViewerLabel.class)) {
					ViewerLabel viewerLabel = (ViewerLabel) convertedValue;
					return viewerLabel.getText();
				}