mod parser {
    pub trait Parser {
        fn apply(self) -> Self;
    }

    pub struct XmlParser {
        pub xml: String,
    }

    impl Default for XmlParser {
        fn default() -> XmlParser {
            return XmlParser {
                xml: String::from(
                    r#"
                        <tag1 att1 = "test">
                            <tag2><!--Test comment-->TEST</tag2>
                            <tag2>
                                Test 2
                            </tag2>
                        </tag1>
                    "#,
                ),
            };
        }
    }

    impl Parser for XmlParser {
        fn apply(self) -> Self {
            println!("{}", self.xml);
            return self;
        }
    }
}

use parser::Parser;
use parser::XmlParser;

fn main() {
    let p = XmlParser {
        ..Default::default()
    };
    p.apply().apply().apply();
}