why not use `a[:T]` instead of `a!T`, it's closer to the current syntax.
- Square brackets for generics Araq
- Square brackets for generics Araq
- Square brackets for generics Hlaaftana
- Square brackets for generics gemath
- Square brackets for generics Araq
- Square brackets for generics timothee
- Square brackets for generics Araq
- Square brackets for generics Sixte
- Square brackets for generics timothee
- Square brackets for generics Araq
- Square brackets for generics AmjadBHD
