New in version 2.0.
Change chromatic_pitch_names_string to named chromatic pitch list:
abjad> pitchtools.chromatic_pitch_names_string_to_named_chromatic_pitch_list("cs, cs cs' cs''")
[NamedChromaticPitch('cs,'), NamedChromaticPitch('cs'), NamedChromaticPitch("cs'"), NamedChromaticPitch("cs''")]
Return list of named chromatic pitches.