Czml-writer Polygon lacks Hierarchy writer

Is there any advice on how to build a polygon using czml-writer? It does not appear to contain the hierarchy, but does contain holes and every other writer I would expect to see. I’ve tried using positions, but I believe this is incorrect as it would assume the positions would be reference frames including time. I just want to draw a static polygon. Do I need to engage with the entities API to fill the gap in czml-writer API?