You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: file.rs
    path of file: ./repos/phaser/phaser/vendor/syn/src
    
    the code of the file until where you have to start completion: use super::*;

ast_struct! {
    /// A complete file of Rust source code.
    ///
    /// *This type is available only if Syn is built with the `"full"` feature.*
    ///
    /// # Example
    ///
    /// Parse a Rust source file into a `syn::File` and print out a debug
    /// representation of the syntax tree.
    ///
    /// ```
   
    
    /// # fn fake_main() {
    ///     let mut args = env::args();
    ///     let _ = args.next(); // executable name
    ///
    ///     let filename = match (args.next(), args.next()) {
    ///         (Some(filename), None) => filename,
    ///         _ => {
    ///             eprintln!("Usage: dump-syntax path/to/filename.rs");
    ///             process::exit(1);
    ///         }
    ///     };
    ///
    ///     let mut file = File::open(&filename).expect("Unable to open file");
    ///
    ///     let mut src = String::new();
    ///     file.read_to_string(&mut src).expect("Unable to read file");
    ///
    ///     let syntax = syn::parse_file(&src).expect("Unable to parse file");
    ///
    ///     // Debug impl is available if Syn is built with "extra-traits" feature.
    ///     println!("{:#?}", syntax);
    /// }