code: def test_color_only_mapping(self):
      p = self.p + aes(color="z")
      assert p == "color_only_mapping"
  
file_path: plotnine/tests/test_geom_point.py
imports: import string
  import numpy
  import pandas
  from plotnine import aes, coord_equal, geom_point, ggplot, guides, lims, scale_color_identity, scale_shape_manual
label_desc: Use image node_id 3 for calling the TestColorFillonUnfilledShape obj's underlying member method code with example usage: obj.test_color_only_mapping() without return types