# File lib/minitest/unit.rb, line 1141
        def self.add_teardown_hook arg=nil, &block
          warn "NOTE: MiniTest::Unit::TestCase#add_teardown_hook is deprecated, use before/after_teardown. It will be removed on 2013-01-01. Called from #{caller.first}"
          hook = arg || block
          @teardown_hooks << hook
        end