An hierarchy of linear rings which define a polygon and its holes.
The holes themselves may also have holes which nest inner polygons.
    
| Name | Type | Description | 
|---|---|---|
| positions | Array.<Cartesian3> | optional A linear ring defining the outer boundary of the polygon or hole. | 
| holes | Array.<PolygonHierarchy> | optional An array of polygon hierarchies defining holes in the polygon. | 
Members
holes : Array.<PolygonHierarchy>
    An array of polygon hierarchies defining holes in the polygon.
positions : Array.<Cartesian3>
    A linear ring defining the outer boundary of the polygon or hole.
