{{- $page := . }}
{{- $format := "" }}
{{- if reflect.IsMap $page }}
  {{- $format = $page.format }}
  {{- $page = $page.page }}
{{- else }}
  {{- $format = partial "get-format.hugo" $page }}
{{- end }}
{{- $ret := "default" }}
{{- if $format }}
  {{ $ret = $format.Name | lower }}
{{- end }}
{{- return $ret }}