if (offset < fReplacementOffset) return false;   return startsWith(document, offset, fDisplayString);
return validate(document, offset, null);
	public boolean isValidFor(IDocument document, int offset) {				if (offset < fReplacementOffset)			return false;					/* 		 * See http://dev.eclipse.org/bugs/show_bug.cgi?id=17667		String word= fReplacementString;		 */ 		return startsWith(document, offset, fDisplayString);	}