Bug 51653 [navigation] Quick Outline: Should also show interface members
I200402102000 We should consider showing the inherited members for interfaces at least when the target type is an interface itself.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/JavaOutlineInformationControl.java
private Map fTypeHierarchies= new HashMap();
		private boolean fShowInheritedMembers;
		/**
		 * Creates a new Outline content provider.
		 * 
		 * @param showInheritedMembers <code>true</code> iff inherited members are shown
		 */
		public OutlineContentProvider(boolean showInheritedMembers) {
			super(true);
			fShowInheritedMembers= showInheritedMembers;
		}
		
		public boolean isShowingInheritedMembers() {