Does anyone know of a better source of documentation for the Zend components?

Question

I am trying to use the Zend_Service_Twitter API and I find the documentation is seriously lacking in depth and clarity.

For example, they have something like this in the documentation:

  $twitter = new Zend_Service_Twitter('myusername', 'mysecretpassword');

  // verify your credentials with Twitter
  $response = $twitter->account->verifyCredentials();

However, there is no indication of what the return values are for this call and how to access the return values.

Does anyone know of a more definitive set of documentation for this API and maybe the entire Zend component library?

Thanks