y.Has "featherlight" }}
    {{- warnf "%q: DEPRECATED usage of 'featherlight' image CSS class found, use 'lightbox' instead; see https://mcshelby.github.io/hugo-theme-relearn/introduction/releasenotes/5/#5-11-0" $page.File.Filename }}
    {{- $effects = merge $effects (dict "lightbox" (ne ($u.Query.Get "featherlight") "false")) }}
  {{- end }}
  {{- range $k, $v := $effects }}
    {{- if $u.Query.Has $k }}
      {{- $effects = merge $effects (dict $k (ne ($u.Query.Get $k) "false")) }}
    {{- end }}
  {{- e