This annotation marks the experimental API for encoding and decoding between binary data and printable ASCII character sequences.

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 @ExperimentalEncodingApi must be accepted either by annotating that usage with the OptIn annotation, e.g. @OptIn(ExperimentalEncodingApi::class), or by using the compiler argument -opt-in=kotlin.io.encoding.ExperimentalEncodingApi.

Since Kotlin