diff --git a/openeo/rest/mlmodel.py b/openeo/rest/mlmodel.py
index 8291c4dba..45b422d5b 100644
--- a/openeo/rest/mlmodel.py
+++ b/openeo/rest/mlmodel.py
@@ -24,6 +24,8 @@ class MlModel(_ProcessGraphAbstraction):
 
     .. versionadded:: 0.10.0
     """
+
+    # TODO
     def __init__(self, graph: PGNode, connection: 'Connection'):
         super().__init__(pgnode=graph, connection=connection)
 
diff --git a/openeo/rest/vectorcube.py b/openeo/rest/vectorcube.py
index a9db44110..7a36cb9d0 100644
--- a/openeo/rest/vectorcube.py
+++ b/openeo/rest/vectorcube.py
@@ -90,6 +90,10 @@ def run_udf(
 
     @openeo_process
     def save_result(self, format: str = "GeoJson", options: dict = None):
+        # TODO?
+        # TODO: check format against supported formats
+        # TODO: should not return a VectorCube again, but bool wrapper
+        # TODO: should save_result also work on non-cube data types, e.g. arrays, scalars?
         return self.process(
             process_id="save_result",
             arguments={
@@ -105,6 +109,7 @@ def execute(self) -> dict:
 
     def download(self, outputfile: str, format: str = "GeoJSON", options: dict = None):
         # TODO: only add save_result, when not already present (see DataCube.download)
+        # TODO
         cube = self.save_result(format=format, options=options)
         return self._connection.download(cube.flat_graph(), outputfile)