This package is included with Vapor by default, just add:
Debugging is a convenient protocol for providing more information about error messages. You can use it in any of your Swift projects.
import PackageDescription let package = Package( name: "Project", dependencies: [ ... .Package(url: "https://github.com/vapor/debugging.git", majorVersion: 1) ], exclude: [ ... ] )
import Debugging to access Debugging' APIs.