getModelPath static method
Absolute on-device read path for an installed model file, keyed by its
fileName (the file's basename, e.g. gemma-4-E2B-it.litertlm). On web
this resolves to a URL/OPFS handle, not a filesystem path. The path is
computed, not stat-ed — it is returned even if nothing is installed there.
Implementation
static Future<String> getModelPath(String fileName) =>
ServiceRegistry.instance.fileSystemService.getReadTargetPath(fileName);