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.
© 2010–2020 JetBrains s.r.o. and Kotlin Programming Language contributors
Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.sequences/map-not-null.html