typo3 fluid f:image srcset

<f:variable name="srcset">
  <f:uri.image image="{member.avatar}" width="250c" height="250c-100" cropVariant="teammember"/> 250w
  <f:uri.image image="{member.avatar}" width="375c" height="375c-100" cropVariant="teammember"/> 375w
</f:variable>
<f:image image="{member.avatar}" width="125c" height="125c-100" cropVariant="teammember"
  class="aspect-square object-contain rounded-full size-[125px]"
  additionalAttributes="{srcset: srcset}"
  />