public void init(DataInputStream input, DataOutputStream output) {
        this.input = input;
        this.output = output;
    }
Names of resources that could not be found. Used to avoid repeated
lookup of commonly accessed, but often not present, resources like
<code>META-INF/services/javax.xml.parsers.SAXParserFactory</code>.
tika-core/src/main/java/org/apache/tika/fork/ClassLoaderProxy.java