Bit late announcing this, but reminded by Michael Tiemann’s talk at JuliaCon.
Announcing MethodInspector.jl
Code at: GitHub - bluesmoon/MethodInspector.jl: Julia package to inspect the names and types of method arguments
Docs at: MethodInspector.jl Documentation · MethodInspector.jl Documentation
This is a package that lets you inspect a method to get the names and types of its positional and keyword arguments in a version independent way.