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kotlinlang

Maybe a newbie question but I don’t find the answer in the doc. In the following code:
```
fun String.toSha1():String {
    val toDigest = this
    val digest = with(MessageDigest.getInstance("SHA-1")) {
        update(toDigest.toByteArray("UTF-8")) //todo inline toDigest
        digest()
    }
    return BigInteger(1, digest).toString(16)
}
```
Is there a way of inlining the toDigest value? Using `this` does not work because of the lambda.