GltfResourceResolver typedef
Resolves an external resource referenced by a multi-file glTF
document (a .bin buffer or an image file).
Given the raw relative URI string from the glTF, returns the
resource's bytes. Supplied by the caller of Node.fromGltfBytes /
importGltf; data: URIs are decoded internally and never reach
the resolver.
Implementation
typedef GltfResourceResolver = Future<Uint8List> Function(String uri);