{{ $valid_states := "alpha, beta, deprecated, stable" }}
{{ $state := .Get "state" }}
{{ $for_k8s_version := .Get "for_k8s_version" | default (.Page.Param "version")}}
{{ $is_valid := strings.Contains $valid_states $state }}
{{ if not $is_valid }}
{{ errorf "%q is not a valid feature-state, use one of %q" $state $valid_states }}
{{ else }}
<div style="margin-top: 10px; margin-bottom: 10px;">
  <b>{{ T "feature_state" }}</b> <code>Kubernetes {{ $for_k8s_version }} [{{ $state }}]</code>
</div>
{{ end }}