isOptional indicates whether the output step has an optional result. Individual conditional attributes are not optional; however, rules and subrules can have optional output.
()
| 454 | // |
| 455 | // Individual conditional attributes are not optional; however, rules and subrules can have optional output. |
| 456 | isOptional() bool |
| 457 | |
| 458 | // condition returns the condition associated with the output. |
| 459 | condition() ast.Expr |