message: Restrict OsfModel#loadRelatedCount relationshipName to RelationshipsFor
diff: @@ -155,7 +155,7 @@ export default class OsfModel extends Model {
  * @param {String} relationshipName Name of a hasMany relationship on the model
  * @returns {Promise} Promise that will resolve when count is loaded
  */
  - async loadRelatedCount(this: OsfModel, relationshipName: string) {
  + async loadRelatedCount<T extends OsfModel>(this: T, relationshipName: RelationshipsFor<T>) {
  const apiModelName = this.store.adapterFor(this.modelName).pathForType(this.modelName);
  const apiRelationshipName = underscore(relationshipName);
  const errorContext = `while loading related counts for ${this.modelName}.${relationshipName}`;
  