for iterative macro, generally it had 2 anchors, one if it is for iterative, and it normally no output (whether got error or not)
it good to have option to remove this anchor when using it in workflow.
so other user no need to identify which one is the True output and which one is just iteration.
additional, if this can apply to input anchor.
(i just built one macro where i don't need the start input, but the input need to be iterate input)