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: events.rb
    path of file: ./repos/stackneveroverflow/vendor/bundle/ruby/2.3.0/gems/puma-3.9.1/lib/puma
    
    the code of the file until where you have to start completion: require 'puma/const'
require "puma/null_io"
require 'stringio'

module Puma
  # The default implement of an event sink object used by Server
  # for when certain kinds of events occu
    
    def unknown_error(server, error, kind="Unknown", env=nil)
      if error.respond_to? :render
        error.render "#{Time.now}: #{kind} error", @stderr
      else
        if env
          string_block = [ "#{Time.now}: #{kind} error handling request { #{env['REQUEST_METHOD']} #{env['PATH_INFO']} }" ]
          string_block << error.inspect
        else
          string_block = [ "#{Time.now}: #{kind} error: #{error.inspect}" ]
        end