Function merged_file_path 

pub fn merged_file_path(
    kotlin_root: &Path,
    file: &KtFile,
    fallback_name: &str,
) -> PathBuf

The flattened on-disk path of one merged file under kotlin_root: io.zenoh.jni.bytes becomes <kotlin_root>/io/zenoh/jni/bytes.kt.

write_files uses this to lay out its output; it is public so a consumer can predict, report or post-process those paths without writing anything. fallback_name names the file when the package is empty.

Examples found in repository

examples/showcase.rs (line 34)

fn main() {
    let fragments = vec![
        types_fragment(),
        session_fragment(),
        natives_fragment(),
        root_fragment(),
    ];

    let files = merge_files(fragments).expect("the showcase model is valid");

    println!("=== generated files ===");
    for file in &files {
        let path = merged_file_path(std::path::Path::new("kotlin"), file, "Generated");
        println!("\n--- {} ---", path.display());
        print!("{}", file.render());
    }

    println!("\n=== identifier helpers ===");
    for raw in ["myValue", "my-field", "2fast", "object", "data", ""] {
        let quoted = format!("{raw:?}");
        let mangled = format!("{:?}", mangle_kotlin_ident(raw));
        let escaped = format!("{:?}", escape_kotlin_ident(raw));
        let valid = is_valid_kotlin_ident(raw);
        let keyword = is_kotlin_hard_keyword(raw);
        println!(
            "{quoted:>10} -> valid={valid:<5} keyword={keyword:<5} \
             mangled={mangled:<10} escaped={escaped}"
        );
    }
    for raw in ["io.example.api", "fun.my-pkg", "io..jni."] {
        let quoted = format!("{raw:?}");
        let mangled = format!("{:?}", mangle_kotlin_package(raw));
        let valid = is_valid_kotlin_package(raw);
        println!("{quoted:>16} -> valid={valid:<5} mangled={mangled}");
    }
}