Bug 89137 [JFace] - API Review - "temporary" API in AbstractTreeViewer
AbstractTreeViewer contains two methods documented as "temporary" internalRefresh(Widget, Object) internalAdd(Widget, Object, Object [])
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/StructuredViewer.java
Assert.isNotNull(filter);
		if (filters != null) {
			
			
			for (Iterator i = filters.iterator(); i.hasNext();) {
				Object o = i.next();
				if (o == filter) {
					i.remove();
					refresh();
					if (filters.size() == 0)
						filters = null;
					return;
				}
			}
		}
	}
	/**
	 * Discards this viewer's filters and triggers refiltering and resorting of
	 * the elements.
	 */
	public void resetFilters() {
		if (filters != null) {
			filters = null;
			refresh();
		}
	}
	/**
	 * Ensures that the given element is visible, scrolling the viewer if
	 * necessary. The selection is unchanged.
	 *