From a8e14346a7c2b1e5377e1d95fbe6d3309d9604e6 Mon Sep 17 00:00:00 2001
From: Mauro Lacy <mauro@lacy.com.es>
Date: Tue, 26 Oct 2021 16:46:35 +0200
Subject: [PATCH] Add clarifying comment

---
 packages/storage-plus/src/indexes.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/storage-plus/src/indexes.rs b/packages/storage-plus/src/indexes.rs
index a33e6696c..8e578daa5 100644
--- a/packages/storage-plus/src/indexes.rs
+++ b/packages/storage-plus/src/indexes.rs
@@ -323,6 +323,7 @@ pub(crate) struct UniqueRef<T> {
 
 /// UniqueIndex stores (namespace, index_name, idx_value) -> {key, value}
 /// Allows one value per index (i.e. unique) and copies pk and data
+/// The optional PK type defines the type of Primary Key deserialization.
 pub struct UniqueIndex<'a, K, T, PK = ()> {
     index: fn(&T) -> K,
     idx_map: Map<'a, K, UniqueRef<T>>,