Mixins is a package for shortening the use of some widgets or properties.

// without Mixins

Column(
    mainAxisAlignment: MainAxisAlignment.center
    children: []
)

Container(
    margin: EdgeInsets.all(15),
    padding: EdgeInsets.symmetric(vertical: 15),
    decoration: BoxDecoration(
        border: Border(top: BorderSide(color: Colors.white)),
        borderRadius: BorderRadius.all(Radius.circular(5)),
    )
)

// with Mixins

Column(
    mainAxisAlignment: Maa.center 
    children: []
)

Container(
    margin: Ei.all(15),
    padding: Ei.sym(v: 15),
    decoration: BoxDecoration(
        border: Br.only(['t'], color: Colors.white),
        borderRadius: Br.radius(5)
    )
)

// use method on helper mixins with Mixins.helper_name, eg:

Mixins.hex('#fff'); // white
Mixins.orientation([DeviceOrientation.landscapeLeft]);