<name>Mixin</name>
        <version>4.1.0+</version>
        <superClass>Parent</superClass>
        <fields>
            <field>
                <name>classifier</name>
                <version>4.1.0+</version>
                <type>String</type>
            </field>
            <field>
                <name>extension</name>
                <version>4.1.0+</version>
                <type>String</type>

    // Sockets on some platforms can have large buffers that mean writes do not block when
    // required. These socket factories explicitly set the buffer sizes on sockets created.
    val socketBufferSize = 4 * 1024
    server.serverSocketFactory =
      object : DelegatingServerSocketFactory(getDefault()) {
        override fun configureServerSocket(serverSocket: ServerSocket): ServerSocket {