- (void)refreshAccessToken:(AlfrescoOAuthData *)oauthData
        completionBlock:(AlfrescoOAuthCompletionBlock)completionBlock; - Refreshes the
      access token represented by the given OAuthData object. A new OAuthData object containing the
      new access token is returned. If the access token cannot be refreshed an exception is
      thrown.
    Parameters
- (AlfrescoOAuthData *)oauthData
 - OAuth data.
 - (AlfrescoOAuthCompletionBlock)completionBlock
 - The completion block called on completion of the operation. The completion block has the format typedef void (^AlfrescoOAuthCompletionBlock)(AlfrescoOAuthData * oauthData, NSError *error);.
 
Returns
(void)
Example