diff --git a/src/palimpzest/core/data/datasources.py b/src/palimpzest/core/data/datasources.py
index f16aedc0..c5a9198e 100644
--- a/src/palimpzest/core/data/datasources.py
+++ b/src/palimpzest/core/data/datasources.py
@@ -148,7 +148,10 @@ def get_item(self, idx: int) -> DataRecord:
 
 
 class MemorySource(DataSource):
-    """MemorySource returns multiple objects that reflect contents of an in-memory Python list"""
+    """MemorySource returns multiple objects that reflect contents of an in-memory Python list
+    TODO(gerardo): Add support for other types of in-memory data structures (he has some code
+                   for subclassing MemorySource on his branch)
+    """
 
     def __init__(self, vals: Any, dataset_id: str = "memory_input"):
         if isinstance(vals, (str, int, float)):