REF: align transform logic flow (#29672)
REF: align transform logic flow (#29672)


dsm054/pandas,gfyoung/pandas,datapythonista/pandas,jorisvandenbossche/pandas,gfyoung/pandas,gfyoung/pandas,jreback/pandas,TomAugspurger/pandas,TomAugspurger/pandas,gfyoung/pandas,datapythonista/pandas,jreback/pandas,pandas-dev/pandas,rs2/pandas,rs2/pandas,dsm054/pandas,rs2/pandas,dsm054/pandas,jreback/pandas,pandas-dev/pandas,jorisvandenbossche/pandas,jorisvandenbossche/pandas,datapythonista/pandas,pandas-dev/pandas,jreback/pandas,TomAugspurger/pandas,gfyoung/pandas,dsm054/pandas,TomAugspurger/pandas,dsm054/pandas,jorisvandenbossche/pandas,jreback/pandas,datapythonista/pandas,pandas-dev/pandas,rs2/pandas