def mandrill_parameters
        {
          key: MandrillBatchMailer.api_key,
          template_name: template_name,
          template_content: [],
          message: {
            subject: subject,
            from_email: from_email,
            from_name: from_name,
            to: to,
            important: false,
            track_opens: nil,
            track_clicks: nil,
            inline_css: true,
            url_strip_qs: nil,
            preserve_recipients: false,
            view_content_link: nil,
            tracking_domain: nil,
            signing_domain: nil,
            return_path_domain: nil,
            merge: true,
            global_merge_vars: global_merge_vars,
            merge_vars: merge_vars,
            tags: tags
          },
          async: true
        }.deep_merge(_default)
      end
def mandrill_parameters
        {
          key: MandrillBatchMailer.api_key,
          template_name: template_name,
          template_content: [],
          message: {
            subject: subject,
            from_email: from_email,
            from_name: from_name,
            to: to,
            important: false,
            track_opens: nil,
            track_clicks: nil,
            inline_css: true,
            url_strip_qs: nil,
            preserve_recipients: false,
            view_content_link: nil,
            tracking_domain: nil,
            signing_domain: nil,
            return_path_domain: nil,
            merge: true,
            global_merge_vars: global_merge_vars,
            merge_vars: merge_vars,
            tags: tags
          },
          async: true
        }.deep_merge(_default)
      end
rubocop:disable MethodLength