class NestHostAttribute extends AttributeInfo {
    /**
     * The name of this attribute <code>"NestHost"</code>.
     */
    public static final String tag = "NestHost";

    NestHostAttribute(ConstPool cp, int n, DataInputStream in) throws IOException {
        super(cp, n, in);
    }

    private NestHostAttribute(ConstPool cp, int hostIndex) {
        super(cp, tag, new byte[2]);
        ByteArray.write16bit(hostIndex, get(), 0);
    }

    /**
     * Makes a copy.  Class names are replaced according to the
     * given <code>Map</code> object.
     *
     * @param newCp     the constant pool table used by the new copy.
     * @param classnames        pairs of replaced and substituted
     *                          class names.
     */
    @Override
    public AttributeInfo copy(ConstPool newCp, Map<String, String> classnames) {<FILL_FUNCTION_BODY>}

    /**
     * Returns <code>host_class_index</code>.  The constant pool entry
     * at this entry is a <code>CONSTANT_Class_info</code> structure.
     * @return the value of <code>host_class_index</code>.
     */
    public int hostClassIndex() {
        return ByteArray.readU16bit(info, 0);
    }
}

        int hostIndex = ByteArray.readU16bit(get(), 0);
        int newHostIndex = getConstPool().copy(hostIndex, newCp, classnames);
        return new NestHostAttribute(newCp, newHostIndex);
    
<methods>public void <init>(org.hotswap.agent.javassist.bytecode.ConstPool, java.lang.String, byte[]) ,public org.hotswap.agent.javassist.bytecode.AttributeInfo copy(org.hotswap.agent.javassist.bytecode.ConstPool, Map<java.lang.String,java.lang.String>) ,public byte[] get() ,public org.hotswap.agent.javassist.bytecode.ConstPool getConstPool() ,public java.lang.String getName() ,public int length() ,public void set(byte[]) <variables>protected org.hotswap.agent.javassist.bytecode.ConstPool constPool,byte[] info,int name