include?

# File activemodel/lib/active_model/validations/clusivity.rb, line 19
      def include?(record, value)
        members = if delimiter.respond_to?(:call)
          delimiter.call(record)
        elsif delimiter.respond_to?(:to_sym)
          record.send(delimiter)
        else
          delimiter
        end

        members.send(inclusion_method(members), value)
      end