supportedGltfExtensions top-level constant
Extensions this loader reads. A file that requires any other is refused, since it can't be shown correctly without it.
Implementation
const Set<String> supportedGltfExtensions = {
'KHR_texture_transform',
'KHR_materials_emissive_strength',
'KHR_materials_unlit',
'KHR_mesh_quantization',
'KHR_lights_punctual',
};