function copyNamedProperties(names, src, dst) {
    names.forEach(function(name) {
      var value = src[name];
      if (value !== undefined) {
        dst[name] = value;
      }
    });
  }
Copy named properties

@param {string[]} names names of properties to copy
@param {object} src object to copy properties from
@param {object} dst object to copy properties to