const_missing

# File activesupport/lib/active_support/dependencies.rb, line 178
      def const_missing(const_name)
        # The interpreter does not pass nesting information, and in the
        # case of anonymous modules we cannot even make the trade-off of
        # assuming their name reflects the nesting. Resort to Object as
        # the only meaningful guess we can make.
        from_mod = anonymous? ? ::Object : self
        Dependencies.load_missing_constant(from_mod, const_name)
      end