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: trampoline.rs
    path of file: ./repos/wasmtime/crates/environ/src/fact
    
    the code of the file until where you have to start completion: //! Low-level compilation of an fused adapter function.
//!
//! This module is tasked with the top-level `compile` function which creates a
//! single WebAssembly function which will perform the ste
    
    fn finish(mut self) {
        // Append the final `end` instruction which all functions require, and
        // then empty out the temporary buffer in `Compiler`.
        self.instruction(End);
        self.flush_code();

        // Flag the function as "done" which helps with an assert later on in
        // emission that everything was eventually finished.
        self.module.funcs[self.result].filled_in = true;
    }