Github user banjiewen commented on the issue:
https://github.com/apache/tinkerpop/pull/351
> To be very explicit, in JSON everything is Doubles and Longs
According to [RFC 7159][1], all numerics (i.e., both integral and decimal)
in JSON are of a single type, Numeric, with implementation-specific ranges. In
any case would "assuming Integer" result in payloads that don't round-trip to
the same types? For example, if I serialize an Integer without a type tag, will
subsequent deserializations (via, say, Jackson) return a Long?
[1]: https://tools.ietf.org/html/rfc7159#section-6
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