hasErrors() {
    let paths = Object.keys(this.entries);

    if (paths.find((entryPath) => this.getEntry(entryPath).hasErrors())) {
      return true;
    }

    return false;
  }
Indicates if there is at least one error in any object in the cache.

@public
@method hasErrors
@return true if there are any errors in the cache, for any entries, else false.