[[!comment format=mdwn
 username="picca"
 avatar="http://cdn.libravatar.org/avatar/7e61c80d28018b10d31f6db7dddb864c"
 subject="comment 1"
 date="2017-11-02T08:29:32Z"
 content="""
I needed to add Typable and the LANGUAGE DeriveDataTypeable extension.


thanks
"""]]
