populate(force = false) {
    if (!this.assetGraph) {
      throw new Error('Asset.populate: Asset is not part of an AssetGraph');
    }
    if (
      (force || this.isLoaded) &&
      !this.keepUnpopulated &&
      !this.isPopulated
    ) {
      // eslint-disable-next-line no-unused-expressions
      this.outgoingRelations; // For the side effects
      this.isPopulated = true;
    }
  }
Go through the outgoing relations of the asset and add the ones
that refer to assets that are already part of the
graph. Recurses into inline assets.

You shouldn't need to call this manually.