Function gen_trait_bridge 

pub fn gen_trait_bridge(
    trait_name: &str,
    prefix: &str,
    trait_methods: &[(&str, &str)],
    has_super_trait: bool,
) -> String

Generate all trait bridge code for a single [[trait_bridges]] entry. Returns Java source code as a String.

has_super_trait: when true, the C vtable includes Plugin lifecycle slots (name_fn, version_fn, initialize_fn, shutdown_fn) and the bridge emits matching upcall stubs. When false, only the trait-method slots are emitted, matching the Rust-side vtable layout exactly.