dist/validations.js
function validatesDuration() {
      Array.from(arguments).forEach(function (name) {
        this.validate(name, function () {
          this.validateDuration(name);
        });
      }, this);

      return this;
    }
function validatesDuration() {
      Array.from(arguments).forEach(function (name) {
        this.validate(name, function () {
          this.validateDuration(name);
        });
      }, this);

      return this;
    }
Public: Adds a validator to the model that checks to make sure the given attributes are valid durations.  ...names - One or more attribute names.  Returns the receiver.