Hey mate that dont look correct to me.
Try this instead.
static TStaticArray4<uint32> vertices;
static TStaticArray4<TStaticArray4 <uint32> > vertex_xy_coords;
Hey mate that dont look correct to me.
Try this instead.
static TStaticArray4<uint32> vertices;
static TStaticArray4<TStaticArray4 <uint32> > vertex_xy_coords;