contentPadding property Null safety
The padding for the input decoration's container.
The decoration's container is the area which is filled if InputDecoration.filled is true and bordered per the border. It's the area adjacent to InputDecoration.icon and above the InputDecoration.icon and above the widgets that contain InputDecoration.helperText, InputDecoration.errorText, and InputDecoration.counterText.
final EdgeInsetsGeometry? contentPadding;