From bc7c00f2a8afa5f94dc7ee8d8e8bc02a1093d73d Mon Sep 17 00:00:00 2001
From: Christian Treffs <ctreffs@gmail.com>
Date: Tue, 1 Oct 2019 07:12:09 +0200
Subject: [PATCH] Add documentation

---
 Sources/FirebladeECS/Nexus.swift | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Sources/FirebladeECS/Nexus.swift b/Sources/FirebladeECS/Nexus.swift
index e05237e..fe7d354 100644
--- a/Sources/FirebladeECS/Nexus.swift
+++ b/Sources/FirebladeECS/Nexus.swift
@@ -29,6 +29,8 @@ public final class Nexus {
     /// - Value: Tightly packed EntityIdentifiers that represent the association of an entity to the family.
     @usableFromInline final var familyMembersByTraits: [FamilyTraitSet: UnorderedSparseSet<EntityIdentifier>]
 
+    /// - Key: A parent entity id.
+    /// - Value: Adjacency Set of all associated children.
     @usableFromInline final var parentChildrenMap: [EntityIdentifier: Set<EntityIdentifier>]
 
     public init() {