How to get the whole fields of a nested struct and send it to app.Tree?

Hello,

I want to get the whole fields of one hdf5 data and set the data struct to app.Tree, I am not familiar with the nested struct data and the app.Tree,

If anyone could help me solving some of those issues I would very much appreciate it.

The data is from https://gamma.hdfgroup.org/ftp/pub/outgoing/NASAHDF/ATL06_20190223232535_08780212_001_01.h5

Thanks a lot for your help.