subtype property
The sub-type of this event. Possible string values are:
- "SUBTYPE_UNSPECIFIED" : Subtype not available.
 - "ADDED" : A suggestion was added.
 - "DELETED" : A suggestion was deleted.
 - "REPLY_ADDED" : A suggestion reply was added.
 - "REPLY_DELETED" : A suggestion reply was deleted.
 - "ACCEPTED" : A suggestion was accepted.
 - "REJECTED" : A suggestion was rejected.
 - "ACCEPT_DELETED" : An accepted suggestion was deleted.
 - "REJECT_DELETED" : A rejected suggestion was deleted.
 
Implementation
core.String? subtype;