1. @DomName('CanvasRenderingContext2D.getImageData')
  2. @DocsEditable()
ImageData getImageData(num sx, num sy, num sw, num sh)

Source 

@DomName('CanvasRenderingContext2D.getImageData')
@DocsEditable()
ImageData getImageData(num sx, num sy, num sw, num sh) =>
    _blink.BlinkCanvasRenderingContext2D.instance
        .getImageData_Callback_4_(this, sx, sy, sw, sh);