StarNode definitions for SANS parser.
StarNode classes in this package are similar to corresponding
classes in starlibj. Unlike starlibj classes,
these have no search* and Unparse() methods, and
are serializable.
Parent class for all nodes. Unlike its starlibj counterpart,
it has a value and get/setValue() methods. What the value is
depends on the node: for DataValueNode it's the value, for
node generated at start of saveframe it's saveframe name, etc.
Identical to StarNode above, stores STAR tag.
STAR value.