guzzle/guzzle — pull request #687 by ivanbatic (2014-06-03 09:31:32+00:00)
Title: Fixed the bug with cached class methods.

When get_class_methods(__CLASS__) was changed to get_class_methods($this), derived classes got a method list from the first instantiated MessageFactory, which could be the parent or a sibling class, so this is fixed now.