// ResourceApplyGradientDescent and similar things).
  Output delta = ops::Placeholder(scope.WithOpName("delta"), DT_FLOAT);

  ops::AssignAddVariableOp increment_op(
      scope.WithOpName("IncrementIteration"), iter,
      ops::Const(scope.WithOpName("one"), static_cast<int64_t>(1)));

  ops::AssignAddVariableOp weights_0_update_op(
      scope.WithOpName("weights_0_update"), weights_0, delta);