private boolean processComment() throws IOException {
        if (!expect(COMMENT_START)) {
            return false;
        }
        if (!expect(TAG_END)) {
            skipUntil(COMMENT_END);
        }
        return true;
    }
Read an attribute from the stream

@return the attribute as a Map.Entry, where the key is the attribute's name and
the value is the attribute's value. If there is no attribute, return null
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-html-module/src/main/java/org/apache/tika/parser/html/charsetdetector/PreScanner.java