To be clear, I am also the author of the PGObject::Util::DBMethod which adds the dbmethod() syntactic sugar used in the third class. One thing to note is that

To be clear, I am also the author of the PGObject::Util::DBMethod which adds the dbmethod() syntactic sugar used in the third class. One thing to note is that this was done specifically in the way it was so that it would fit in with Moose-like idioms, so it is more a matter of extending the Moo(se) way than it is creating a whole new idiom.