code: def LCHab_to_Lab(cobj, *args, **kwargs):
      
      lab_l = cobj.lch_l
      lab_a = math.cos(math.radians(cobj.lch_h)) * cobj.lch_c
      lab_b = math.sin(math.radians(cobj.lch_h)) * cobj.lch_c
      return LabColor(
          lab_l, lab_a, lab_b, illuminant=cobj.illuminant, observer=cobj.observer)
docs: Convert from LCH(ab) to Lab.