code: function defaults(object, defs) {
    var key;
    object = assign({}, object);
    defs = defs || {};
    // Iterate over object non-prototype properties:
    for (key in defs) {
      if (defs.hasOwnProperty(key)) {
        // Replace values with defaults only if undefined (allow empty/zero values):
        if (object[key] == null) {
          object[key] = defs[key];
        }
      }
    }
    return object;
  }
docs: Extends an object with a defaults object, similar to underscore's _.defaults
  
  Used for abstracting parameter handling from API methods