From 89abdd4ccaf79eab8dc76e4c323f8ded14ab0dcd Mon Sep 17 00:00:00 2001
From: Mathew Polzin <matt.polzin@gmail.com>
Date: Mon, 10 Dec 2018 21:11:48 -0800
Subject: [PATCH] fix example code in Playground

---
 JSONAPI.playground/Sources/Entities.swift | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/JSONAPI.playground/Sources/Entities.swift b/JSONAPI.playground/Sources/Entities.swift
index c47dd34..14c2a89 100644
--- a/JSONAPI.playground/Sources/Entities.swift
+++ b/JSONAPI.playground/Sources/Entities.swift
@@ -25,7 +25,7 @@ extension String: CreatableRawIdType {
 
 // MARK: - typealiases for convenience
 public typealias ExampleEntity<Description: EntityDescription> = Entity<Description, NoMetadata, NoLinks, String>
-public typealias ToOne<E: OptionalRelatable> = ToOneRelationship<E, NoMetadata, NoLinks>
+public typealias ToOne<E: Identifiable> = ToOneRelationship<E, NoMetadata, NoLinks>
 public typealias ToMany<E: Relatable> = ToManyRelationship<E, NoMetadata, NoLinks>
 
 // MARK: - A few resource objects (entities)