diff --git a/tensorflow_graphics/io/triangle_mesh.py b/tensorflow_graphics/io/triangle_mesh.py
index 8bcb540d0..4528ad1eb 100644
--- a/tensorflow_graphics/io/triangle_mesh.py
+++ b/tensorflow_graphics/io/triangle_mesh.py
@@ -37,6 +37,15 @@ def get(self, name):
       data = f.read()
     return data
 
+  def keys(self):
+    raise NotImplementedError('GFileResolver.keys not implemented')
+
+  def namespaced(self, namespace):
+    return GFileResolver(os.path.join(self.directory, namespace))
+
+  def write(self, name, data):
+    raise NotImplementedError('GFileResolver.write not implemented')
+
 
 def load(file_obj, file_type=None, **kwargs):
   """Loads a triangle mesh from the given GFile/file path.