message: Switched Object.assign to explicit property assign in AnalysisContext.
diff: @@ -260,8 +260,8 @@ export class AnalysisContext {
  urlLoader: this._loader,
  urlResolver: this._resolver,
  };
  - if (options) {
  - Object.assign(contextOptions, options);
  + if (options && options.urlLoader) {
  + contextOptions.urlLoader = options.urlLoader;
  }
  const copy = new AnalysisContext(contextOptions);
  if (!cache) {
  