Value types:
void
boolean
byte
short
char
int
long
float
double

Class types:
class SomeClass
class ValueClass
class scala.collection.immutable.List
class scala.Tuple2

Arrays:
class [Lscala.runtime.BoxedUnit;
class [I
class [D
class [Lscala.collection.immutable.List;

Functions:
interface scala.Function2
interface scala.Function1