build/es-class.max.amd.js
function copyValueIfObject(where, how) {
    var what = where[VALUE];
    if (isObject(what)) {
      where[VALUE] = how(what);
    }
  }
function copyValueIfObject(where, how) {
    var what = where[VALUE];
    if (isObject(what)) {
      where[VALUE] = how(what);
    }
  }
function copyValueIfObject ( where , how ) { var what = where [ VALUE ] ; if ( isObject ( what ) ) { where [ VALUE ] = how ( what ) ; } }
shortcut to copy objects into descriptor.value
shortcut to copy objects into descriptor . value