code: def test_scale_manual_values_dict():
      spec = gg.scale_fill_manual(values=dict(a="A", b="B", c="C"))
      as_dict = spec.as_dict()
      assert as_dict["breaks"] == ["a", "b", "c"]
      assert as_dict["values"] == ["A", "B", "C"]
  
imports: import pytest
  import lets_plot
  from lets_plot.plot.core import FeatureSpec
  from lets_plot.plot.core import FeatureSpecArray
  from lets_plot.plot.scale import _scale
label_desc: Use image node_id 12 for calling a global function with example usage: test_scale_manual_values_dict() without return types