resolve

# File ext/psych/lib/psych/class_loader.rb, line 49
    def resolve klassname
      name    = klassname
      retried = false

      begin
        path2class(name)
      rescue ArgumentError, NameError => ex
        unless retried
          name    = "Struct::#{name}"
          retried = ex
          retry
        end
        raise retried
      end
    end