private void parseBitmapHex(String attribute, String value, String bitmap) {
        PositionedString s = new PositionedString(bitmap);
        s.consume('0');
        s.consume('x');
        addAttribute(attribute, value, new BigInteger(s.substring().trim(),16));
    }
Adds attributes with the specified bitmap to normalizer.
@param attribute Attribute to add
@param value Value of attribute
@param bitmap Bitmap as a hex number, with a '0x' prefix.
container-search/src/main/java/com/yahoo/search/querytransform/BooleanAttributeParser.java