fixup! Add a placeholder for bokeh engine

rs2 · rs2 · commit 1ad51278627f · 2017-11-14T20:51:07.000Z
diff --git a/pandas/plotting/_core.py b/pandas/plotting/_core.py
@@ -2913,3 +2913,5 @@ def hexbin(self, x, y, C=None, reduce_C_function=None, gridsize=None,
 
 base.register_engine("matplotlib", 'series', MPLSeriesPlotMethods)
 base.register_engine("matplotlib", 'frame', MPLFramePlotMethods)
+
+base.register_engine('bokeh', 'series', BokehSeriesPlotMethods)
