SJSPlatform

Is the SAMType cls also a SAM under the rules of the Scala.js back-end?

Is the given class symbol eligible for Java serialization-specific methods?

This is not simply false because we still want to add them to Scala classes and objects. They might be transitively used by macros and other compile-time code. It feels safer to have them be somewhat equivalent to the ones we would get in a JVM project. The JVM back-end will slap an extends java.io.Serializable to them, so we should be consistent and also emit the proper serialization methods.

The given class has a main method.

We could get away with excluding BoxedBooleanClass for the purpose of equality testing since it need not compare equal to anything but other booleans, but it should be present in case this is put to other uses.

Update classpath with a substituted subentry

Scala.js-specific definitions.