ballpark_ranks_since_mrca_with
- ballpark_ranks_since_mrca_with(focal: Union[HereditaryStratigraphicColumn, HereditaryStratigraphicSpecimen], other: Union[HereditaryStratigraphicColumn, HereditaryStratigraphicSpecimen]) float | None
Calculate a fast, rough estimate of generations elapsed since MRCA with other.
See estimate_ranks_since_mrca_with for details.