diff --git a/image_prediction/image_extractor/extractors/parsable.py b/image_prediction/image_extractor/extractors/parsable.py
index 7d26b29..894c360 100644
--- a/image_prediction/image_extractor/extractors/parsable.py
+++ b/image_prediction/image_extractor/extractors/parsable.py
@@ -193,7 +193,7 @@ def has_alpha_channel(doc: Doc, xref: int):
     maybe_image = load_image_handle_from_xref(doc, xref)
     maybe_smask = maybe_image["smask"] if maybe_image else None
 
-    if maybe_smask:  # Use monad
+    if maybe_smask:  # TODO: Use monad.
         return any([doc.extract_image(maybe_smask) is not None, bool(fitz.Pixmap(doc, maybe_smask).alpha)])
     else:
         try:
@@ -261,7 +261,7 @@ def normalize_channels(array: np.ndarray):
 
 
 @lru_cache(maxsize=None)
-def load_image_handle_from_xref(doc: Doc, xref: int) -> Union[dict, None]:  # TODO: use Monad
+def load_image_handle_from_xref(doc: Doc, xref: int) -> Union[dict, None]:  # TODO: Use monad.
     return doc.extract_image(xref)