twiggy paths

The twiggy paths sub-command finds the call paths to a function in the given binary's call graph. This tells you what other functions are calling this function, why this function is not dead code, and therefore why it wasn't removed by the linker.

 Shallow Bytes │ Shallow % │ Retaining Paths
───────────────┼───────────┼───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
           153 ┊     5.43% ┊ wee_alloc::alloc_with_refill::hb32c1bbce9ebda8e
               ┊           ┊   ⬑ <wee_alloc::size_classes::SizeClassAllocPolicy<'a> as wee_alloc::AllocPolicy>::new_cell_for_free_list::h3987e3054b8224e6
               ┊           ┊       ⬑ elem[0]
               ┊           ┊           ⬑ table[0]
               ┊           ┊   ⬑ hello
               ┊           ┊       ⬑ export "hello"