Incremental regex matching in Kotlin

Question

This code snipped searches for the first regex match in a file for which one of the capture groups matches a local variable, and then obtains the value of the other capture group.

Is it possible to write this in an idiomatic, more efficient version which doesn't find all matches up front, but rather matches incrementally, without an explicit loop?

val id = ANCHOR_REGEX.findAll(apiFile.readText())
                     .find { label == it.groups["label"]?.value }
                     ?.let { it.groups["id"]?.value }