reduceRight
abstract fun reduceRight(callbackfn: (previousValue: Number, currentValue: Number, currentIndex: Number, array: Uint8Array) -> Number): Number
abstract fun reduceRight(callbackfn: (previousValue: Number, currentValue: Number, currentIndex: Number, array: Uint8Array) -> Number, initialValue: Number): Number
abstract fun <U> reduceRight(callbackfn: (previousValue: U, currentValue: Number, currentIndex: Number, array: Uint8Array) -> U, initialValue: U): U