Platform and version requirements: JVM (1.1)
An extra int. Bits of this number represent the following flags:
- 0 - this is a multi-file class facade or part, compiled with
- 1 - this class file is compiled by a pre-release version of Kotlin and is not visible to release versions.
- 2 - this class file is a compiled Kotlin script source file (.kts).
- 3 - the metadata of this class file is not supposed to be read by the compiler, whose major.minor version is less than the major.minor version of this metadata (mv).