where to got  code:"link sc-multiome(GEX+ATAC) data"

Hello! i am a beginner and followed by steps in Get_Started notebook, and i cannot find the code of  "link sc-multiome(GEX+ATAC) data". I also failed to search the relerant code in redeem_reproducibility. Could you please point me to somewhere to get the full tutorial that can help me finish the cell state aware phylogenetic tree?  Thank you!