presto-parser/src/main/java/io/prestosql/sql/tree/LambdaExpression.java/LambdaExpression/getChildren
class LambdaExpression:    @Override
    public List<Node> getChildren()
    {
        ImmutableList.Builder<Node> nodes = ImmutableList.builder();
        nodes.addAll(arguments);
        nodes.add(body);
        return nodes.build();
    }