public class UnassignableReturnException extends RuntimeException
ClassCastException except that it is thrown before the cast would ever occur. For primitive return types,
this is similar to a NullPointerException being thrown when the return value is null and therefore
cannot be un-boxed.addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString