def method_missing(method_sym, *args, &block)
      unless (obj = _referenced_object)
        ::PEROBS.log.fatal "Internal consistency error. No object with ID " +
          "#{@id} found in the store."
      end
      if obj.respond_to?(:is_poxreference?)
        ::PEROBS.log.fatal "POXReference that references a POXReference found."
      end
      obj.send(method_sym, *args, &block)
    end
def method_missing(method_sym, *args, &block)
      unless (obj = _referenced_object)
        ::PEROBS.log.fatal "Internal consistency error. No object with ID " +
          "#{@id} found in the store."
      end
      if obj.respond_to?(:is_poxreference?)
        ::PEROBS.log.fatal "POXReference that references a POXReference found."
      end
      obj.send(method_sym, *args, &block)
    end
Proxy all calls to unknown methods to the referenced object.