@Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        content.append(ch, start, length);
        super.characters(ch, start, length);
    }
Sets the locator to use when reporting errors.

@param locator The locator to use.
stroom-annotation/stroom-annotation-pipeline/src/main/java/stroom/annotation/pipeline/AnnotationWriter.java