strange, why does the following not compile? ```f...

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[devbridie]

strange, why does the following not compile?

fun Integer.isEven(): Boolean {
    return (this % 2 == 0)
}

Fails with Kotlin: Unresolved reference. None of the following candidates is applicable because of receiver type mismatch: @InlineOnly public operator inline fun BigDecimal.mod(other: BigDecimal): BigDecimal defined in kotlin