code.getStatements().add(0, new ExpressionStatement(variableDeclaration));
            }

            // Move default values into body of closure, so they can use <inputs-lvar>
            for (Parameter parameter : expression.getParameters()) {
                if (parameter.hasInitialExpression()) {

            }
            emptyScript = isEmpty(source);
        }

        private boolean isEmpty(SourceUnit source) {
            List<Statement> statements = source.getAST().getStatementBlock().getStatements();
            for (Statement statement : statements) {
                if (AstUtils.mayHaveAnEffect(statement)) {
                    return false;
                }
            }