Interface CSSUnitValue

interface CSSUnitValue {
    unit: string;
    value: number;
    add(...values: CSSNumberish[]): CSSNumericValue;
    div(...values: CSSNumberish[]): CSSNumericValue;
    equals(...value: CSSNumberish[]): boolean;
    max(...values: CSSNumberish[]): CSSNumericValue;
    min(...values: CSSNumberish[]): CSSNumericValue;
    mul(...values: CSSNumberish[]): CSSNumericValue;
    sub(...values: CSSNumberish[]): CSSNumericValue;
    to(unit: string): CSSUnitValue;
    toString(): string;
    toSum(...units: string[]): CSSMathSum;
    type(): CSSNumericType;
}