merge method

ButtonThemeData merge(
  1. ButtonThemeData other
)

These styles, each taking from other's what it leaves unset.

Implementation

ButtonThemeData merge(ButtonThemeData other) => ButtonThemeData(
  icon: icon?.merge(other.icon) ?? other.icon,
  text: text?.merge(other.text) ?? other.text,
  filled: filled?.merge(other.filled) ?? other.filled,
  outlined: outlined?.merge(other.outlined) ?? other.outlined,
);