{{ $s := .section }}
{{ $firstSection := .firstSection }}
{{ $pages := (union $s.Pages $s.Sections).ByWeight }}
{{ $first := index $s.Pages 0}}
{{ if $first }}
    {{ if $first.IsPage }}
        <a href="{{ $first.RelPermalink }}">{{ $firstSection.LinkTitle }}</a>
    {{ else }}
        {{ partial "firstPageInSection" (dict "section" $first "firstSection" $firstSection)  }}
    {{ end }}
{{ else }}
    <a href="{{ $s.RelPermalink }}">{{ $firstSection.LinkTitle }}</a>
{{ end }}