# File lib/aws/core/option_grammar.rb, line 191
            def apply(option, member_descriptors)
              super(option)
              member_option = option.member_option if option.respond_to?(:member_option)
              member_option ||= ListMember.new
              member_option = member_option.extend_with_config(*member_descriptors)
              MetaUtils.extend_method(option, :member_option) { member_option }
            end