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: build.rs
    path of file: ./repos/flapigen-rs/android-example
    
    the code of the file until where you have to start completion: use flapigen::{JavaConfig, LanguageConfig};
use std::{env, path::Path};

fn main() {
    
fn main() {
    env_logger::init();
    let out_dir = env::var("OUT_DIR").unwrap();
    let in_src = Path::new("src").join("java_glue.rs.in");
    let out_src = Path::new(&out_dir).join("java_glue.rs");
    //ANCHOR: config
    let swig_gen = flapigen::Generator::new(LanguageConfig::JavaConfig(
        JavaConfig::new(
            Path::new("app")
                .join("src")
                .join("main")
                .join("java")
                .join("net")
                .join("akaame")
                .join("myapplication"),
            "net.akaame.myapplication".into(),
        )
        .use_null_annotation_from_package("android.support.annotation".into()),
    ))
    .rustfmt_bindings(true);
    //ANCHOR_END: config
    swig_gen.expand("android bindings", &in_src, &out_src);
    println!("cargo:rerun-if-changed={}", in_src.display());
}