configuration property

ImageConfiguration configuration

The settings to pass to the decoration when painting, so that it can resolve images appropriately. See ImageProvider.resolve and BoxPainter.paint.

The ImageConfiguration.textDirection field is also used by direction-sensitive Decorations for painting and hit-testing.

Implementation 

ImageConfiguration get configuration => _configuration;
void configuration= (ImageConfiguration value)

Implementation 

set configuration(ImageConfiguration value) {
  assert(value != null);
  if (value == _configuration)
    return;
  _configuration = value;
  markNeedsPaint();
}