HarmonyOS 绘制图形，radius无法使用数组定义4个圆角

@Entry  
@Component  
struct RectPage {  
  @State message: string = 'Hello World';  
  build() {  
    Row() {  
      Column() {  
        Rect()  
          .width('100%')  
          .height(40)  
          .fillOpacity(0.0)  
          .linearGradient({ angle: 0, colors: [[0x2d2d2d, 0.0], [0xffff00, 1.0]] })  
          .clip(new Rect({ width: '100%', height: 40, radius: [[0, 0], [0, 0], [20, 20], [20, 20]] }))  
      }  
      .width('100%')  
    }  
    .height('100%')  
  }  
}