instance method respond_to?

# File activerecord/lib/active_record/relation.rb, line 49
    def respond_to?(method, include_private = false)
      return true if arel.respond_to?(method, include_private) || Array.method_defined?(method) || @klass.respond_to?(method, include_private)

      if match = DynamicFinderMatch.match(method)
        return true if @klass.send(:all_attributes_exists?, match.attribute_names)
      elsif match = DynamicScopeMatch.match(method)
        return true if @klass.send(:all_attributes_exists?, match.attribute_names)
      else
        super
      end
    end