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: sources_command.rb
    path of file: ./repos/powerstation/powerstation/lib/compiled-jruby/lib/ruby/stdlib/rubygems/commands
    
    the code of the file until where you have to start completion: require 'rubygems/command'
require 'rubygems/remote_fetcher'
require '
    
  def remove_cache_file desc, path # :nodoc:
    FileUtils.rm_rf path

    if not File.exist?(path) then
      say "*** Removed #{desc} source cache ***"
    elsif not File.writable?(path) then
      say "*** Unable to remove #{desc} source cache (write protected) ***"
    else
      say "*** Unable to remove #{desc} source cache ***"
    end