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: mod.rs
    path of file: ./repos/flapigen-rs/macroslib/src/java_jni
    
    the code of the file until where you have to start completion: mod fclass;
mod fenum;
mod find_cache;
mod finterface;
mod java_code;
mod map_class_self_type;
mod map_type;
mod rust_code;

use log::debug;
use proc_macro2::{Span, TokenStream};
use quote::quote;
use rustc_hash::{FxHashMap, FxHashSet};
use smol_str::SmolStr;
use std::{fmt, io::Write, path::PathBuf};
use syn::{spanned::Spanned, Type};

use crate::{
    error::{invalid_src_id_span, DiagnosticError, Result},
    extension::{ClassExtHandlers, ExtHandlers, MethodExtHandlers},
    file_cache::FileWriteCache,
    typemap::{
        ast::{
            che
    
fn method_name(method: &ForeignMethod, f_method: &JniForeignMethodSignature) -> String {
    let need_conv = f_method.input.iter().any(|v: &JavaForeignTypeInfo| {
        v.java_converter
            .as_ref()
            .map(|x| !x.converter.is_empty())
            .unwrap_or(false)
    }) || f_method
        .output
        .java_converter
        .as_ref()
        .map(|x| !x.converter.is_empty())
        .unwrap_or(false);
    match method.variant {
        MethodVariant::StaticMethod if !need_conv => method.short_name().as_str().to_string(),
        MethodVariant::Method(_) | MethodVariant::StaticMethod => {
            format!("do_{}", method.short_name())
        }
        MethodVariant::Constructor => "init".into(),
    }
}