@Override
    public void visitMethodInsn(int opcode, String owner, String name, String descriptor, boolean isInterface) {
      myCanBeNull = nextCanBeNullValue(opcode, owner, name, descriptor); /*is not a constructor call*/
      super.visitMethodInsn(opcode, owner, name, descriptor, isInterface);
    }
@Override
    public void visitMethodInsn(int opcode, String owner, String name, String descriptor, boolean isInterface)