LiQL: view_friendly_date of post_time

Dear Community,

we are using a LiQL query like that:

<#assign mostviewedMessages = restadmin("2.0", "/search?q=" + ("SELECT * FROM messages where conversation.style='blog' AND depth=0 ORDER BY metrics.views DESC limit 5")?url).data.items![] />

Is it possible to get the post_time of the messages also in view_friendly format like “2 weeks ago”? How?

${mostviewedMessage.post_time } shows “Jul 8, 2016 12:34:13 PM”
${mostviewedMessage.post_time@view_friendly_date} is not working

Thank you, Best,
Clemens