Bool | Nil, but I guess it would be true only in the first branch and false | nil in the second
JSON::Serializableand create a general class, which consumes any json string and returns Hash representation.
crystal spec --help. Because it's a runtime option, you currently only get the help by building and runnning the spec (
crystal spec -- --help)
superwont work because its not the same method
::parent_methodwould do it?
super.parent_methoddoesnt work either