Difference public struct Difference: Fn Difference represents the set of resources present in the source set and not in any of the other specified sets. Reference. init(_:) Declaration Swift public init(_ sets: Expr...) Parameters sets Sets of resources to perform the difference. © 2018 Fauna, Inc. All rights reserved. (Last updated: 2018-03-21) Generated by jazzy ♪♫ v0.8.2, a Realm project.