alignedDropdown:

true

height:

40.0

);

Code after migration, using ButtonTheme:

ButtonTheme

minWidth:

10.0

alignedDropdown:

true

height:

40.0

);

Code after migration, using ButtonBarTheme:

ButtonBarTheme

data:

ButtonBarThemeData

buttonMinWidth:

10.0

buttonAlignedDropdown:

true

buttonHeight:

40.0

);

References

API documentation:

ButtonTheme

ButtonBarTheme

ButtonBar