pub unsafe extern "C" fn cft_args_set_autotune_validation_file(
handle: *mut fasttext_args_t,
autotune_validation_file: *const c_char
)pub unsafe extern "C" fn cft_args_set_autotune_validation_file(
handle: *mut fasttext_args_t,
autotune_validation_file: *const c_char
)