seq property
Sequence number of the message (also known as message ID). The seq for
the first message sent by a client or debug adapter is 1, and for each
subsequent message is 1 greater than the previous message sent by that
actor. seq can be used to order requests, responses, and events, and to
associate requests with their corresponding responses. For protocol
messages of type request the sequence number can be used to cancel the
request.
Implementation
final int seq;