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: injector.rb
    path of file: ./repos/bundler/lib/bundler
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Bundler
  class Injector
    INJECTED_GEMS = "injected gems".freeze

    def self.inject(new_deps, options = {})
      injector = new(new_deps, options)
      injector.inject(Bundler.default_gemfile, Bundler.default_lockfile)
    end

    def self.remove(gems, options = {})
      injector = new(gems, options)
      injector.remove(Bundler.default_gemfile, Bundler.default_lockfile)
    end

    def initialize(deps, options = {})
      @
    
    def cross_check_for_errors(gemfile_path, original_deps, removed_deps, initial_gemfile)
      # evaluate the new gemfile to look for any failure cases
      builder = Dsl.new
      builder.eval_gemfile(gemfile_path)

      # record gems which were removed but not requested
      extra_removed_gems = original_deps - builder.dependencies

      # if some extra gems were removed then raise error
      # and revert Gemfile to original
      unless extra_removed_gems.empty?
        SharedHelpers.write_to_gemfile(gemfile_path, initial_gemfile.join)

        raise InvalidOption, "Gems could not be removed. #{extra_removed_gems.join(", ")} would also have been removed. Bundler cannot continue."
      end