public static extern int nk_tree_push_hashed(
nk_context *ctx,
nk_tree_type tree_type,
byte *title,
nk_collapse_states initial_state,
byte *hash,
int len,
int seed
);
public static extern void nk_window_collapse_if(nk_context *ctx, byte *name, nk_collapse_states state, int cond);
