message: BuildInTechniqueId is a const enum
diff: /*---------------------------------------------------------------------------------------------
  | $Copyright: (c) 2018 Bentley Systems, Incorporated. All rights reserved. $
  *--------------------------------------------------------------------------------------------*/
  -export enum BuiltInTechniqueId {
  +export const enum BuiltInTechniqueId {
  // Techniques with many different variations
  kSurface,
  kPolyline,
  