static ApplicationData fromSlime(Slime slime) {
        Cursor cursor = slime.get();
        return new ApplicationData(ApplicationId.fromSerializedForm(cursor.field(APPLICATION_ID_FIELD).asString()),
                                   optionalLong(cursor.field(ACTIVE_SESSION_FIELD)),
                                   optionalLong(cursor.field(LAST_DEPLOYED_SESSION_FIELD)));
    }
Data class for application id, active session and last deployed session

@author hmusum
configserver/src/main/java/com/yahoo/vespa/config/server/application/ApplicationData.java