Here are people who have contributed to the development of Jackson JSON processor
Guava datatype component, version 2.x
(version numbers in brackets indicate release in which the problem was fixed)

Tatu Saloranta (tatu.saloranta@iki.fi): author

Steven Schlansker (steven@nesscomputing.com): co-author

Stephan Schroevers: (Stephan202@github)

* Contributed #56: Add support `HashCode`
 (2.5.0)
