Add pipeline support for Dataset.map

holoviews/core/data/__init__.py

@@ -13,7 +13,9 @@
 
 from .. import util
 from ..accessors import Redim
-from ..dimension import Dimension, process_dimensions, Dimensioned
+from ..dimension import (
+    Dimension, process_dimensions, Dimensioned, LabelledData
+)
 from ..element import Element
 from ..ndmapping import OrderedDict, MultiDimensionalMapping
 from ..spaces import HoloMap, DynamicMap
@@ -1007,13 +1009,16 @@ def clone(self, data=None, shared_data=True, new_type=None, *args, **overrides):
 
         return new_dataset
 
+    # Overrides of superclass methods that are needed so that PipelineMeta
+    # will find them to wrap with pipeline support
     def options(self, *args, **kwargs):
-        # Override so that PipelineMeta finds method to wrap it with pipeline
-        # support
         return super(Dataset, self).options(*args, **kwargs)
-
     options.__doc__ = Dimensioned.options.__doc__
 
+    def map(self, *args, **kwargs):
+        return super(Dataset, self).map(*args, **kwargs)
+    map.__doc__ = LabelledData.map.__doc__
+
     @property
     def iloc(self):
         """Returns iloc indexer with support for columnar indexing.