anchor.diff:         <email-reference xmlns:e="urn:grean:schemas:email:2014">
            <e:data-address>""" + expected + """</e:data-address>
          </email-reference>"""
  -    |> handle
  +    |> handle |> ignore
   
       verify <@ verified = ref true @>
   
  
positive.code:        <email-reference xmlns:e="urn:grean:schemas:email:2014">
           <e:data-address>""" + dataAddress + """</e:data-address>
         </email-reference>"""
      |> handle
  
      verify <@ verified = ref true @>
  
  
negative.code:        <email-reference xmlns:e="urn:grean:schemas:email:2014">
           <e:data-address>http://non.existing.blob/ni/kos</e:data-address>
         </email-reference>"""
      |> handle |> ignore
  
      verify <@ verified = ref false @>
  