reusablePlugSetHash property
If this socket's plugs come from a reusable DestinyPlugSetDefinition, this is the identifier for that set. We added this concept to reduce some major duplication that's going to come from sockets as replacements for what was once implemented as large sets of items and kiosks (like Emotes). As of Shadowkeep, these will come up much more frequently and be driven by game content rather than custom curation.
Implementation
@JsonKey(name:'reusablePlugSetHash')
int? reusablePlugSetHash;