Unwrap hemi data from a named hemi list.
hemilist.unwrap(hemi_list, hemi = NULL, allow_null_list = FALSE)
named list, can have entries 'lh' and/or 'rh'
character string, the hemi data name to retrieve from the list. Can be NULL if the list only has a single entry.
logical, whether to silently return NULL instead of raising an error if 'hemi_list' is NULL
the data