zendframework/zf2 — pull request #3399 by jaiswarvipin (2013-01-10 13:27:51+00:00)
Title: Update library/Zend/Log/Logger.php

Added the group() and groupEnd() methods in the logger to user the firebug feature in the new version of Zend Framework.
For same i am first checking that is writer object is present or not and and doing some checks and after successful checks i am calling the public methods (new added method in in the /writer/Firebug.php) to reset of the operation.