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object Test {
class Ctl {
def enable: this.type = { System.out.println("enable"); this }
}
class MouseCtl extends Ctl {
def mouseDown(x: int, y: int): unit = { System.out.println("mouse down"); }
}
def main(args: Array[String]) =
new MouseCtl().enable.mouseDown(1, 2);
}
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