Bug 305703 [Viewers][CommonNavigator] remembered contributions can leak when using filters
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/StructuredViewer.java
return true;
		}
		if (filters != null) {
			for (int i = 0, n = filters.size(); i < n; ++i) {
				ViewerFilter filter = (ViewerFilter) filters.get(i);
				if (filter.isFilterProperty(element, property)) {
					return true;
				}
			}
		}
		return false;
	}
	/**
	 * Returns a new hashtable using the given capacity and this viewer's element comparer.
	 * 
	 * @param capacity the initial capacity of the hashtable
	 * @return a new hashtable
	 * 
	 * @since 3.0
	 */
	CustomHashtable newHashtable(int capacity) {
		return new CustomHashtable(capacity, getComparer());
	}
	/**
	 * Attempts to preserves the current selection across a run of the given
	 * code. This method should not preserve the selection if
	 * {link #getPreserveSelection()} returns false.
	 * <p>
	 * The default implementation of this method:
	 * <ul>