code: def get_data(self, element, ranges, style):
      data, mapping, style = super().get_data(element, ranges, style)
      self._compute_quads(element, data, mapping)
      style["nodes_line_color"] = "black"
      self._compute_labels(element, data, mapping)
      self._patch_hover(element, data)
      return data, mapping, style
  
file_path: holoviews/holoviews/plotting/bokeh/sankey.py
imports: import numpy
  import param
  from bokeh.models import Patches
  from ...core.data import Dataset
  from ...core.util import dimension_sanitizer, max_range
  from ...util.transform import dim
  from .graphs import GraphPlot
label_desc: Use image node_id 2 for calling the SankeyPlot obj's underlying member method code with example usage: obj.get_data(element, ranges, style) and returns: data,  mapping,  style