The names of the TextTheme properties match this table from the /// Material Design spec /// with two exceptions: the styles called H1-H6 in the spec are /// headline1-headline6 in the API, and body1,body2 are called /// bodyText1 and bodyText2.
NAME SIZE WEIGHT SPACING 2018 NAME /// display4 112.0 thin 0.0 headline1 /// display3 56.0 normal 0.0 headline2 /// display2 45.0 normal 0.0 headline3