# File lib/minitest/unit.rb, line 1106
        def self.add_setup_hook arg=nil, &block
          warn "NOTE: MiniTest::Unit::TestCase.add_setup_hook is deprecated, use before/after_setup via a module (and call super!). It will be removed on 2013-01-01. Called from #{caller.first}"
          hook = arg || block
          @setup_hooks << hook
        end