title: AWS Cloudformation: Reuse result of Fn::FindInMap
body: <p>In template.yml, a mapping regionToDomainMap is defined and I am accessing that in multiple places with <code>{Fn::FindInMap: [regionToDomainMap, Ref: Region, &quot;regionToDomain&quot;]}</code>.</p>
  <p>Is there a way to assign this to a variable and use that instead of using this long form everywhere?</p>