Rename the () placeholder to FieldNotPresent #1987
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Motivation
In the transaction version 5 RFC, we use
()(an empty tuple) as a place holder when an anchor isn't present in that transaction version.But it would be clearer to use a unit
struct FieldNotPresent;.Solution
()withFieldNotPresentReview
@oxarbitrage can review, this change conflicts with #1829.
Related Issues
Closes #1971.
Conflicts with #1829.