diff --git a/utilities/ml.py b/utilities/ml.py
index e5ab87a3..92b3e960 100644
--- a/utilities/ml.py
+++ b/utilities/ml.py
@@ -81,14 +81,6 @@ class Dataset(ABC):
     def generate_dataset(reactions, *args, **kwargs):
         pass
 
-    def at(self, position: int) -> Dataset:
-        """See __getitem__"""
-        return self[position]
-
-    def limit(self, limit: int) -> Dataset:
-        """See __getitem__"""
-        return self[:limit]
-
     def __iter__(self):
         """Use polars iter_rows for iterating over the dataset"""
         return self.df.iter_rows()
@@ -180,7 +172,7 @@ class RuleBasedDataset(Dataset):
 
     def structure_id(self, index: int):
         """Get the UUID of a compound"""
-        return self.df.item(index, "structure_id")
+        return self.item(index, "structure_id")
 
     def X(self, exclude_id_col=True, na_replacement=0):
         """Get all the feature and trig columns"""