Function fdf_env_dispatcher_get_dump_deprecated 

pub unsafe extern "C" fn fdf_env_dispatcher_get_dump_deprecated(
    dispatcher: *mut fdf_dispatcher_t,
    out_dump: *mut *mut c_char,
)

DO NOT USE THIS. This is a temporary function added to debug https://fxbug.dev/42069837.

Dumps the state of the dispatcher into |out_dump|, as a NULL terminated string. The caller is responsible for freeing |out_dump|.