nbColor top-level property Null safety

Implementation

NativeBaseColor nbColor = NativeBaseColor(
    amber,
    blue,
    blueGray,
    coolGray,
    cyan,
    dark,
    darkBlue,
    emerald,
    fuchsia,
    gray,
    green,
    indigo,
    lightBlue,
    lime,
    orange,
    pink,
    purple,
    red,
    rose,
    teal,
    text,
    trueGray,
    warmGray,
    yellow,
    white,
    black,
    primary);