code: def validate(name=DEFAULT, all_names=False):
      
      for namespace in get_namespaces_from_names(name, all_names):
          all(value_proxy.get_value() for value_proxy in namespace.get_value_proxies())
docs: Validate all registered keys after loading configuration.
  
      Missing values or values which do not pass validation raise
      :class:`staticconf.errors.ConfigurationError`. By default only validates
      the `DEFAULT` namespace.
  
      :param name: the namespace to validate
      :type  name: string
      :param all_names: if True validates all namespaces and ignores `name`
      :type  all_names: boolean