INTERNAL: Do not use. An actual type of a pack expression at the instatiation point.
In the following example, PackType will appear around makeTuple call site as Pack{String, Int}:
func makeTuple<each T>(_ t: repeat each T) -> (repeat each T) { ... }
makeTuple("A", 2)
More details: https://github.com/apple/swift-evolution/blob/main/proposals/0393-parameter-packs.md
Import path
import codeql.swift.generated.RawDirect supertypes
Predicates
| getElement | Gets the |
| getNumberOfElements | Gets the number of elements of this pack type. |
| toString |