// RUN: %target-swift-frontend -typecheck %S/Inputs/default-witness.swift -primary-file %s -enable-resilience | |
public protocol GraphType { | |
func insert<U>(_: GraphNode<U>, _: GraphNode<U>) | |
} | |
public extension GraphType { | |
func insert<N: Node>(_: N, _: GraphNode<N.Output>) {} | |
} | |