}
ParseTreeSpecializer specializer = new ParseTreeSpecializer();
parseTree = specializer.specialize(parseTree,
excludedVariables, _scope);
ParseTreeWriter writer = new ParseTreeWriter();
String outputExpression = writer
.printParseTree(parseTree);
parameter.setExpression(outputExpression);
}
} catch (ClassCastException ex) {
Settable parameter = (Settable) actor