void addMagic(Magic magic) {
        if (magic == null) {
            return;
        }
        if (magics == null) {
            magics = new ArrayList<>();
        }
        magics.add(magic);
    }
Add some rootXML info to this mime-type

@param namespaceURI
@param localName
tika-core/src/main/java/org/apache/tika/mime/MimeType.java