toCollection

Platform and version requirements: JVM (1.7), JRE8 (1.7)

@ExperimentalStdlibApi fun <T : Any, C : MutableCollection<in T>> Optional<T>.toCollection(
    destination: C
): C

Appends this Optional's value to the given destination collection if present.

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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.jvm.optionals/java.util.-optional/to-collection.html