[ntuple] detect custom streamers of class members #20448
Description
Check duplicate issues.
- Checked for duplicates
Description
RNTuple needs to check if a class member adopts a custom streamer (and not the class as a whole). Also if only a single member uses a custom streamer, a streamer field must be used. The information is found in the real data.
Reproducer
tbd
ROOT version
master
Installation method
from sources
Operating system
n/a
Additional context
No response