# File lib/aws/core/xml_grammar.rb, line 433
        def validate_config_method(method)
          allow_methods = %w(
            rename attribute_name boolean integer long float list force
            ignore collect_values symbol_value timestamp map_entry map
            blob
          )
          unless allow_methods.include?(method.to_s)
            raise "#{method} cannot be used in configuration"
          end
        end