import com.sun.xml.internal.ws.org.objectweb.asm.*;

class Asmator {

    static byte[] fixup(byte[] buf) throws java.io.IOException {

        ClassReader cr = new ClassReader(buf);

        ClassWriter cw = new ClassWriter(0) {

            public MethodVisitor visitMethod(

                final int access,

                final String name,

                final String desc,

                final String signature,

                final String[] exceptions)

            {

                MethodVisitor mv = super.visitMethod(access,

                        name,

                        desc,

                        signature,

                        exceptions);

                if (mv == null)  return null;

                if (name.equals("callme")) {

                    // make receiver go dead!

                    mv.visitInsn(Opcodes.ACONST_NULL);

                    mv.visitVarInsn(Opcodes.ASTORE, 0);

                }

                return mv;

            }

        };

        cr.accept(cw, 0);

        return cw.toByteArray();

    }

}