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: rack_protection.rs
    path of file: ./repos/ferrocarril/mruby-gems/src/rubygems
    
    the code of the file until where you have to start completion: use mruby::load::MrbLoadSources;
use mruby::Mrb;
use mruby::MrbError;
use std::borrow::Cow;
use std::convert::AsRef;

use crate::Gem;

/// Load the [`RackProtection`] gem into an interpreter.
pub fn init(interp: &Mrb) -> Result<(), MrbError> {
    RackProtection::init(interp)
}

/// Gem
#[derive(RustEmbed)]
#[folder = "$CARGO_MANIFEST_DIR/vendor/ruby/2.6.0/gems/rack-protection-2.0.5/lib"]
struct RackProtection;

impl RackProtection {
    fn contents<T: AsRef<str>>(path: T) -> Result<Vec<u8>, MrbError> {
        let path = path.as_ref();
        let contents = Self::get(path)
            .map(Cow::into_owned)
            .ok_or_else(|| MrbError::SourceNotFound(path.to_owned()))?;
        // patches
        if path == "rack/protection/base.rb" {
            let mut string = String::from_utf8(contents)
                .map_err(|_| MrbError::SourceNotFound(path.to_owned()))?;
            string = strin
    
    fn contents<T: AsRef<str>>(path: T) -> Result<Vec<u8>, MrbError> {
        let path = path.as_ref();
        let contents = Self::get(path)
            .map(Cow::into_owned)
            .ok_or_else(|| MrbError::SourceNotFound(path.to_owned()))?;
        // patches
        if path == "rack/protection/base.rb" {
            let mut string = String::from_utf8(contents)
                .map_err(|_| MrbError::SourceNotFound(path.to_owned()))?;
            string = string.replace(
                "define_method(:default_options) { super().merge(options) }",
                "define_method(:default_options) { @default_options ||= DEFAULT_OPTIONS; @default_options.merge(options) }",
            );
            string = string.replace(
                "def default_options\n        DEFAULT_OPTIONS\n      end",
                "def default_options; @default_options ||= DEFAULT_OPTIONS; end",
            );
            string = string.replace("defined? SecureRandom", "true");
            Ok(string.into_bytes())
        } else {
            Ok(contents)
        }
    }