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: lib.rs
    path of file: ./repos/phaser/phaser/vendor/wasm-bindgen/src
    
    the code of the file until where you have to start completion: //! Runtime support for the `wasm-bindgen` tool
//!
//! This crate contains th
    
        pub unsafe extern "C" fn __wbindgen_free(ptr: *mut u8, size: usize) {
            // This happens for zero-length slices, and in that case `ptr` is
            // likely bogus so don't actually send this to the system allocator
            if size == 0 {
                return
            }
            let align = mem::align_of::<usize>();
            let layout = Layout::from_size_align_unchecked(size, align);
            dealloc(ptr, layout);
        }