instance method method_missing

# File activemodel/lib/active_model/schematized_json.rb, line 81
        def method_missing(method_name, *args, **kwargs)
          key = method_name.to_s.remove(/(\?|=)/)

          if @schema.key? key.to_sym
            if method_name.ends_with?("?")
              @data[key].present?
            elsif method_name.ends_with?("=")
              @data[key] = lookup_schema_type_for(key).cast(args.first)
            else
              @data[key]
            end
          else
            super
          end
        end