Function try_dump_file 

pub fn try_dump_file(
    path: &str,
    name: &str,
    file: &str,
    test_only: bool,
) -> Option<(Vec<u32>, bool)>

Port of try_dump_file(char *path, char *name, char *file, int *ksh, int test_only) from Src/parse.c:3746. Tries to load function name from a .zwc digest (<path>.zwc) or per-function compiled file (<file>.zwc) when each is newer than its uncompiled source.