different heights for rows

[quanshuli]

Is your feature request related to a problem? Please describe.
i'm trying to set row height based on how many events there are but can only find rowheight to set the row height for every row.

Describe the solution you'd like
a row builder or alike to be able to change the row height individually.

Describe alternatives you've considered
if marker builder can change the row height would be good too.