in accumulator/batch.go [106:124]
func (b *Batch) RegisterInvocation(
reqID, functionARN string,
deadlineMs int64,
timestamp time.Time,
) {
b.mu.Lock()
defer b.mu.Unlock()
i, ok := b.invocations[reqID]
if !ok {
i = &Invocation{}
b.invocations[reqID] = i
}
i.RequestID = reqID
i.FunctionARN = functionARN
i.DeadlineMs = deadlineMs
i.Timestamp = timestamp
b.currentlyExecutingRequestID = reqID
}