函数 createDefaultProps

返回 {
    allowPicking: undefined | boolean;
    arcType: undefined | CzmArcType;
    classificationType: ESJClassificationType;
    depthTest: undefined | boolean;
    material: ReactiveVariable<CzmMaterialJsonType>;
    positions: ReactiveVariable<undefined | [number, number, number][]>;
    show: undefined | boolean;
    width: undefined | number;
}