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Null check
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@ -165,7 +165,7 @@ export class Background implements dts.Background {
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}
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public isEmpty(): boolean {
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return types.isUndefined(this.image) && types.isUndefined(this.color);
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return types.isNullOrUndefined(this.image) && types.isNullOrUndefined(this.color);
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}
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public static equals(value1: Background, value2: Background): boolean {
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