The `sun.misc.Unsafe.defineClass` class has been removed. Users should use the public replacement, `java.lang.invoke.MethodHandles.Lookup.defineClass`, added in Java SE 9. For more details see the Java documentation:

[https://docs.oracle.com/javase/9/docs/api/java/lang/invoke/MethodHandles.Lookup.html#defineClass-byte:A-](https://docs.oracle.com/javase/9/docs/api/java/lang/invoke/MethodHandles.Lookup.html#defineClass-byte:A-)