Adding renderThreadInfo comment to explain data accessor

src/components/views/rooms/EventTile.tsx

@@ -546,6 +546,12 @@ export default class EventTile extends React.Component<IProps, IState> {
             return null;
         }
 
+        /**
+         * Accessing the threads value through the room due to a race condition
+         * that will be solved when there are proper backend support for threads
+         * We currently have no reliable way to discover than an event is a thread
+         * when we are at the sync stage
+         */
         const room = MatrixClientPeg.get().getRoom(this.props.mxEvent.getRoomId());
         const thread = room.threads.get(this.props.mxEvent.getId());