Method setPropValue

packages/designer/src/document/node/node.ts:835–837

* 设置单个属性值

(path: string, value: any)

   * 设置单个属性值
   */
  setPropValue(path: string, value: any) {
    this.getProp(path, true)!.setValue(value);
  }

  /**
   * 清除已设置的值