Helper function for count_within_batch and count_within_many. This does the actual work of calling count_within multiple times and accumulating the result.
count_within_many_impl(csd, name, combos, radius, phenotype_rules)
Cell seg data for a single field.
Name associated with `csd`, for example the basename of the image file.
List of pairs of (from phenotype name, to phenotype name) and tissue category.
Vector of radii.
Named list of phenotype rules.