From 2ee6250db9223eaab8be6c730be9923ff8902ae2 Mon Sep 17 00:00:00 2001
From: Alexander Rose <alex.rose@rcsb.org>
Date: Tue, 29 Jan 2019 12:36:09 -0800
Subject: [PATCH] type def tweak

---
 src/mol-model/structure/model/types.ts | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/src/mol-model/structure/model/types.ts b/src/mol-model/structure/model/types.ts
index 22714b509..e3c42bba6 100644
--- a/src/mol-model/structure/model/types.ts
+++ b/src/mol-model/structure/model/types.ts
@@ -56,10 +56,7 @@ export const enum MoleculeType {
     saccharide
 }
 
-const AtomRole = {
-    trace: '', direction: '', backboneStart: '', backboneEnd: ''
-}
-export type AtomRole = keyof typeof AtomRole
+export type AtomRole = 'trace' | 'direction' | 'backboneStart' | 'backboneEnd'
 
 export const MoleculeTypeAtomRoleId: { [k: number]: { [k in AtomRole]: string } } = {
     [MoleculeType.protein]: {
-- 
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