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

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

    private NestMembersAttribute(ConstPool cp, byte[] info) {
        super(cp, tag, info);
    }

    /**
     * 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>number_of_classes</code>.
     * @return the number of the classes recorded in this attribute.
     */
    public int numberOfClasses() {
        return ByteArray.readU16bit(info, 0);
    }

    /** Returns <code>classes[index]</code>.
     * 
     * @param index   the index into <code>classes</code>.
     * @return the value at the given index in the <code>classes</code> array.
     *   It is an index into the constant pool.
     *   The constant pool entry at the returned index is a
     *   <code>CONSTANT_Class_info</code> structure.
     */
    public int memberClass(int index) {
        return ByteArray.readU16bit(info, index * 2 + 2);
    }
}

        byte[] src = get();
        byte[] dest = new byte[src.length];
        ConstPool cp = getConstPool();

        int n = ByteArray.readU16bit(src, 0);
        ByteArray.write16bit(n, dest, 0);

        for (int i = 0, j = 2; i < n; ++i, j += 2) {
            int index = ByteArray.readU16bit(src, j);
            int newIndex = cp.copy(index, newCp, classnames);
            ByteArray.write16bit(newIndex, dest, j);
        }

        return new NestMembersAttribute(newCp, dest);
    
<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