private boolean isKeyValid(NLSSubstitution substitution) { if (!fNLSRefactoring.isEclipseNLS()) return true;
private boolean isKeyValid(NLSSubstitution substitution, RefactoringStatus status) {
	private boolean isKeyValid(NLSSubstitution substitution) {		if (!fNLSRefactoring.isEclipseNLS())			return true;				if (substitution == null)			return false;				if (substitution.getState() != NLSSubstitution.EXTERNALIZED)			return true;				String key= substitution.getKey();		if (key == null || key.length() == 0 || !Character.isJavaIdentifierStart(key.charAt(0)))			return false;				for (int i= 1, length= key.length(); i < length; i++)			if (!Character.isJavaIdentifierPart(key.charAt(i)))				return false;				return true;	}