Add deprecated warnings to LabelList

Author: Val Brodsky

labelbox/data/annotation_types/collection.py

@@ -22,6 +22,9 @@ class LabelList:
     Use on smaller datasets.
     """
 
+    warnings.warn("LabelList is deprecated and will be "
+                "removed in a future release.")
+
     def __init__(self, data: Optional[Iterable[Label]] = None):
         if data is None:
             self._data = []
@@ -187,6 +190,9 @@ def __init__(self, data: Generator[Label, None, None], *args, **kwargs):
         super().__init__(data, *args, **kwargs)
 
     def as_list(self) -> "LabelList":
+        warnings.warn("This method is deprecated and will be "
+                "removed in a future release. LabeList"
+                " class will be deprecated.")
         return LabelList(data=list(self))
 
     def assign_feature_schema_ids(