Extracts the 'i'th pattern.
Replaces the 'i'th pattern with the argument.
(row: StringAdd).self
(row: StringFormat).self
(row: ArrowAssoc[Row]).x
(Since version 2.10.0) Use leftOfArrow
instead
(row: Ensuring[Row]).x
(Since version 2.10.0) Use resultOfEnsuring
instead
* States, Rows, Etc. **