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Common
JVM
JS
Native
1.0
ExperimentalStdlibApi()

This annotation marks the standard library API that is considered experimental and is not subject to the general compatibility guarantees given for the standard library: the behavior of such API may be changed or the API may be removed completely in any further release.

Beware using the annotated API especially if you're developing a library, since your library might become binary incompatible with the future versions of the standard library.

Any usage of a declaration annotated with @ExperimentalStdlibApi must be accepted either by annotating that usage with the UseExperimental annotation, e.g. @UseExperimental(ExperimentalStdlibApi::class), or by using the compiler argument -Xuse-experimental=kotlin.ExperimentalStdlibApi.