Question: Is it possible to count the number of rows in an event set?

[ZeroCool2u]

All the count() functions seem to be windowed or moving.

I have an eventset with two indices and would like to create a feature from the number of rows in these event sets. It doesn't seem to be possible without adding a new column of 1's and then use cumsum, but you can't add a new constant value column in Temporian either as far as I can tell.

I've looked all over the docs and can't find a straight forward solution to this, but it seems like surely I've overlooked something and there must be a more direct way to do this?

Any advice would be appreciated!