Array missing value in attribute how to identify has_content?

Summary

Array missing value in attribute how to identify has_content?

Content

I have an array "detailsLines" returned by custom component , it is possible that Description attribute may not be present I am trying to catch that and struggling to make it work, below the syntax i am using, what is i am possibly missing

 

<#if detailsLines.Description.value?has_content> ${detailsLines.Description}\n <#else>no description</#if>