code: function normalizeOptions(options, Ctor) {
    if (!options) {
      return null;
    }
  
    if (options instanceof Ctor) {
      return options;
    }
  
    var instance = new Ctor();
  
    Object.keys(options).forEach(function(key) {
      if (typeof options[key] !== "undefined") {
        instance[key] = options[key];
      }
    });
  
    return instance;
  }
docs: Normalize an object to match a struct.
  
  @param {String, Object} oid - The oid string or instance.
  @return {Object} An Oid instance.