How to use the ember-resolver.js function in ember-resolver

},
            },
          ],
        },
        this.options.vendorFiles
      ),
      isNull
    );

    this._addJqueryInLegacyEmber();

    if (this._addonInstalled('ember-resolver') || !bowerDeps['ember-resolver']) {
      // if the project is using `ember-resolver` as an addon
      // remove it from `vendorFiles` (the npm version properly works
      // without `app.import`s)
      delete this.vendorFiles['ember-resolver.js'];
    }

    // Warn if ember-cli-shims is not included.
    // certain versions of `ember-source` bundle them by default,
    // so we must check if that is the load mechanism of ember
    // before checking `bower`.
    let emberCliShimsRequired = this._checkEmberCliBabel(this.project.addons);
    if (!emberShims && !addonEmberCliShims && !bowerEmberCliShims && emberCliShimsRequired) {
      this.project.ui.writeWarnLine(
        "You have not included `ember-cli-shims` in your project's `bower.json` or `package.json`. This only works if you provide an alternative yourself and unset `app.vendorFiles['app-shims.js']`."
      );
    }

    // If ember-testing.js is coming from Bower (not ember-source) and it does not
    // exist, then we remove it from vendor files. This is needed to support versions
    // of Ember older than 1.8.0 (when ember-testing.js was incldued in ember.js itself)