Update _collection.py

Author: phofl

dask_expr/_collection.py

@@ -5771,7 +5771,7 @@ def merge_asof(
     del kwargs["on"]
 
     for o in [left_on, right_on]:
-        if isinstance(o, FrameBase):
+        if isinstance(o, _Frame):
             raise NotImplementedError(
                 "Dask collections not currently allowed in merge columns"
             )
@@ -6522,3 +6522,8 @@ def _compute_partition_stats(
         return (mins, maxes, lens)
     else:
         return (non_empty_mins, non_empty_maxes, lens)
+
+
+@get_parallel_type.register(FrameBase)
+def get_parallel_type_frame(o):
+    return get_parallel_type(o._meta)