return checkNode(NodeFinder.perform(root, offset, length));
return checkNode(NodeFinder.perform(root, offset, length), unit);
	private static ASTNode getTargetNode(ICompilationUnit unit, CompilationUnit root, int offset, int length) {		ASTNode node= null;		try {			node= checkNode(NodeFinder.perform(root, offset, length, unit));		} catch(JavaModelException e) {			// Do nothing		}		if (node != null)			return node;		return checkNode(NodeFinder.perform(root, offset, length));	}