message: Comment fix.
diff: | $Copyright: (c) 2018 Bentley Systems, Incorporated. All rights reserved. $
  *--------------------------------------------------------------------------------------------*/
  import { Point3d, Vector3d, Point2d, RotMatrix, Transform, Geometry, Arc3d } from "@bentley/geometry-core";
  -import { IModelApp } from "./IModelApp";
  +import { IModelApp } from "./IModelApp"; // This must be first to avoid import cycles.
  import { Viewport } from "./Viewport";
  import { BentleyStatus } from "@bentley/bentleyjs-core";
  import { StandardViewId, ViewState } from "./ViewState";
  