In what way is pygmalion a shavian play

Instead the preface of Pygmalion focuses more on one of the themes in the play, Phonetics.The play Pygmalion is the good study-book in which the determinism issues are considered.The Shavian forethought is felt in the whole play.But Pygmalion would not be Shavian if there were no didactics, contrasts and many-sidedness.Shaw named the plays plays-discussions.They need to know something about their background, what they are doing on or in a certain scene.The audience also needs this background information to understand actions in the course of the play.Pygmalion by George Bernard Shaw does not have anything similar.It also includes some personal opinions on the play.Entirely clear the intention pursued by Shaw, having named the play a name of the mythical king.