include?

# File activemodel/lib/active_model/validations/clusivity.rb, line 18
      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

        if value.is_a?(Array)
          value.all? { |v| members.public_send(inclusion_method(members), v) }
        else
          members.public_send(inclusion_method(members), value)
        end
      end