qdoc: non-member functions are documented as member functions

/*!
   \since 5.5
   \relates QJSEngine

   Returns the QJSEngine associated with \a object, if any.

   This function is useful if you have exposed a QObject to the JavaScript environment
   and later in your program would like to regain access. It does not require you to
   keep the wrapper around that was returned from QJSEngine::newQObject().
 */
QJSEngine *qjsEngine(const QObject *object)
{
...
}