text: /*global define*/
  define(function() {
    /**
     * Mixes properties from source into target.
     * @param  {Object} target   target of the mix.
     * @param  {Object} source   source object providing properties to mix in.
     * @param  {Boolean} override if target already has a the property,
     * override it with the one from source.
     * @return {Object}          the target object, now with the new properties
     * mixed in.
     */
    return function mix(target, source, override) {
      Object.keys(source).forEach(function(key) {
        if (!target.hasOwnProperty(key) || override)
          target[key] = source[key];
      });
      return target;
    };
  });
  