Lambda with receiver

Alternative implementation

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Select the alternative implementation of this code:

val multiply: (Int, Int) -> Int = { a, b -> a.times(b) }

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fun multiply(f: (Int) -> Int): Int = return this.{f()}

val multiply: Int.(Int) -> Int = { b -> times(b) }

val multiply: (Int, Int) -> Int = { b -> it.times(b) }

val multiply: Int.(Int) -> Int = { b -> it.times(b) }

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