merged_options

# File activesupport/lib/active_support/cache.rb, line 867
        def merged_options(call_options)
          if call_options
            call_options = normalize_options(call_options)
            if call_options.key?(:expires_in) && call_options.key?(:expires_at)
              raise ArgumentError, "Either :expires_in or :expires_at can be supplied, but not both"
            end

            expires_at = call_options.delete(:expires_at)
            call_options[:expires_in] = (expires_at - Time.now) if expires_at

            if call_options[:expires_in].is_a?(Time)
              expires_in = call_options[:expires_in]
              raise ArgumentError.new("expires_in parameter should not be a Time. Did you mean to use expires_at? Got: #{expires_in}")
            end
            if call_options[:expires_in]&.negative?
              expires_in = call_options.delete(:expires_in)
              handle_invalid_expires_in("Cache expiration time is invalid, cannot be negative: #{expires_in}")
            end

            if options.empty?
              call_options
            else
              options.merge(call_options)
            end
          else
            options
          end
        end