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def bone(range, **traits):
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""" Generator function for the 'bone' colormap. """
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_data = {'red': ((0., 0., 0.),(1.0, 1.0, 1.0)),
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'green': ((0., 0., 0.),(1.0, 1.0, 1.0)),
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'blue': ((0., 0., 0.),(1.0, 1.0, 1.0))}
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_data = {'red': ((0., 0., 0.), (0.746032, 0.652778, 0.652778), (1.0, 1.0, 1.0)),
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'green': ((0., 0., 0.), (0.365079, 0.319444, 0.319444), (0.746032, 0.777778, 0.777778), (1.0, 1.0, 1.0)),
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'blue': ((0., 0., 0.), (0.365079, 0.444444, 0.444444), (1.0, 1.0, 1.0))}
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return ColorMapper.from_segment_map(_data, range=range, **traits)