Bug 77598 [nls tooling] NLS hovers / Ctrl+Click not consistent for duplicate keys
20041103 With the following files, the key A.0 is duplicate. - Ctrl + Click: Junps to 'hello' - Hover over "A.0" in class A: shows 'world' public class A { String h= Messages.getString("A.0"); //$NON-NLS-1$ } messages.properties: A.0=hello A.0=world
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
CompilationUnit ast= JavaPlugin.getDefault().getASTProvider().getAST(input, ASTProvider.WAIT_NO, null);
				if (ast == null)
					return null;
				
				ASTNode node= NodeFinder.perform(ast, offset, 1);
				if (!(node instanceof StringLiteral))
					return null;
				
				fNLSKeyStringLiteral= (StringLiteral)node;
				IRegion region= new Region(fNLSKeyStringLiteral.getStartPosition(), fNLSKeyStringLiteral.getLength());
				AccessorClassReference ref= NLSHintHelper.getAccessorClassReference(ast, region);
				if (ref != null)
					return region;
				
				fNLSKeyStringLiteral= null;
				return null;
				
					
			} catch (JavaModelException e) {
				return null;	
			}
		}
		
		private IRegion findAndSetURLText(IDocument document, int offset) {
			fURLString= null;
			if (document == null)
				return null;