> We have a special grammar rule for `Circle`: https://github.com/rubberduck-vba/Rubberduck/blob/a707020343a71bc5bf9b700b339c7c2deb858c67/Rubberduck.Parsing/Grammar/VBAParser.g4#L581
It's expecting expressions after every comma, which is not what you have here. In theory the grammar rule could be adapted to allow for empty expressions, which would match the optional argument usage.
If we'd attempt to be strict, we might adapt the grammar rule to deal with the full syntax as specified in [t