Bug 92851 [Viewers] [api] protected field StructuredViewer.colorAndFontCollector
3.1 HEAD colorAndFontCollector protected ColorAndFontCollector colorAndFontCollector This read-write field was added as API in the 3.1 cycle. Exposing fields as API (other than public static final ones) is bad practice because a client can change the field and there's nothing the class can do to prevent or even track that change. All access to read-write field should be through accessor methods, including access from subclasses. Also, this field is missing an @since 3.1 tag.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TreeViewer.java
ILabelProvider lprov = null;
		IViewerLabelProvider vprov = null;
		
		if(prov instanceof ILabelProvider)
			lprov = (ILabelProvider) prov;
		
		if (prov instanceof IViewerLabelProvider) {
			vprov = (IViewerLabelProvider) prov;
		} 
		
		if (prov instanceof ITableLabelProvider) {
			tprov = (ITableLabelProvider) prov;
		}
		
		
		int columnCount = tree.getColumnCount();
		if (columnCount == 0) {
								
			ViewerLabel updateLabel = new ViewerLabel(treeItem.getText(),
					treeItem.getImage());
			if(vprov != null)
				buildLabel(updateLabel,element,vprov);
			else{
				if(lprov != null)
					buildLabel(updateLabel,element,lprov);
			}
			
			
			if (treeItem.isDisposed()) {
				unmapElement(element);