fun <T, R : Any> Sequence<T>.mapNotNull( transform: (T) -> R? ): Sequence<R>
Returns a sequence containing only the non-null results of applying the given transform function to each element in the original sequence.
The operation is intermediate and stateless.
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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.sequences/map-not-null.html