# Load SomeClass, SomeClass::Subclass, and SomeClass::AnotherSubClass
use SomeClass qw/::SubClass ::AnotherSubClass/;

# Load SomeOtherClass and SomeFullyQualifiedSubClass::Name
use SomeOtherClass qw/SomeFullyQualifiedSubClass::Name/;

# Load all classes 'below' StateClass in the namespace
use StateClass '*';