ReferenceHashable.swift

protocol ReferenceEquatable: AnyObject, Equatable {}

extension ReferenceEquatable {
	static func == (lhs: Self, rhs: Self) -> Bool {
		return lhs === rhs
	}
}

protocol ReferenceHashable: ReferenceEquatable, Hashable {}

extension ReferenceHashable {
	func hash(into hasher: inout Hasher) {
		ObjectIdentifier(self).hash(into: &hasher)
	}
}