Thanks for the fix!

This is also a showcase some quirks of the Perl language:

• Parentheses are optional after method and subroutine calls. A method needs at least one parameter, and it was not provided with the $self-> syntax, so Perl picks up whatever comes next.
• The * is a valid (but fortunately rarely used these days) sigil. It is not a multiplication here, but indicates a glob reference.
• Really quirky: Spaces are allowed between a sigil and its identifier. So the identifier of * $rim is $rim, which is a symbolic reference.

use v5.40.0 implies "strict refs", so Perl complains about *$rim even before trying to use it as the invocant of the method (as I originally thought).

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