assertNotNull(untypedNullVariable);
assertEquals(NULL, untypedNullVariable.getType());
variables.remove(NULL_VAR_NAME);
// no type information present
for (String varName : variables.keySet()) {
TypedValue typedValue = variables.getValueTyped(varName);
assertNull(typedValue.getType());
assertEquals(variables.get(varName), typedValue.getValue());
}