function Composite3DTileContent(tileset, tile, resource, contents) {
  this._tileset = tileset;
  this._tile = tile;
  this._resource = resource;

  if (!defined(contents)) {
    contents = [];
  }
  this._contents = contents;

  this._metadata = undefined;
  this._group = undefined;
  this._ready = false;
}
Represents the contents of a
{@link https://github.com/CesiumGS/3d-tiles/tree/main/specification/TileFormats/Composite|Composite}
tile in a {@link https://github.com/CesiumGS/3d-tiles/tree/main/specification|3D Tiles} tileset.
<p>
Implements the {@link Cesium3DTileContent} interface.
</p>

@alias Composite3DTileContent
@constructor

@private