Function flake_lock_flags_set_mode_check 

pub unsafe extern "C" fn flake_lock_flags_set_mode_check(
    context: *mut c_context,
    flags: *mut flake_lock_flags,
) -> err

@brief Put the lock flags in a mode that checks whether the lock is up to date. @param[out] context Optional, stores error information @param[in] flags The flags to modify @return NIX_OK on success, NIX_ERR on failure

This causes nix_flake_lock to fail if the lock needs to be updated.