@Override
  public void visitInsn(int opcode) {
    if (opcode == Opcodes.ARETURN && myCheckReturnLabel != null) {
      mv.visitJumpInsn(Opcodes.GOTO, myCheckReturnLabel);
    }
    else {
      mv.visitInsn(opcode);
    }
  }
@Override
  public void visitInsn(int opcode)