Github user FlorianHockmann commented on the issue:
https://github.com/apache/tinkerpop/pull/816
>I think this is a good change though it doesn't exactly mimic the Java API
right? there is no until(P) in java - it's until(Predicate), but I guess that
doesn't really make sense in this GLV to support something like that because we
can really only serialize values of P across to the server.
This will be changed with PR #815 that introduces new interfaces, one of
which is `IPredicate` that we use in Gremlin.Net in places where Java uses
`Predicate`. My idea was that users could write either predicates in the form
of lambdas (PR #814) or implement their own predicates which would also require
their own serialization. Geo-predicates or full-text search are an example
where implementing custom predicates like this would make sense.
I'll add something for the upgrade docs. Although it will probably just
concentrate on cases where users already implemented their own predicates as
there should be no visible changes for users that only used our predicates.
`P.gt(1).and(P.lt(3))` can still be called exactly the same way. The only
difference is that they now get back a `P` object instead of a
`TraversalPredicate`.
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