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: base.rb
    path of file: ./repos/ferrocarril/mruby-gems/vendor/ruby/2.6.0/gems/sinatra-2.0.5/lib/sinatra
    
    the code of the file until where you have to start completion: # coding: utf-8
# frozen_string_literal: true

# external dependencies
require 'rack'
require 'tilt'
require 'rack/protection'
require 'mustermann'
require 'mustermann/sinatra'
require 'mustermann/regular'

# stdlib dependencies
require 'thread'
require 'time'
require 'uri'

# other files we need
require 'sinatra/indifferent_hash'
require 'sinatra/show_exceptions'
require 'sinatra/version'

module Sinatra
  # The request object. See Rack::Request for more info:
  # http://rubydoc.info/github/rack/rack/master/Rack/Request
  c
    
    def compile_template(engine, data, options, views)
      eat_errors = options.delete :eat_errors
      template_cache.fetch engine, data, options, views do
        template = Tilt[engine]
        raise "Template engine not found: #{engine}" if template.nil?

        case data
        when Symbol
          body, path, line = settings.templates[data]
          if body
            body = body.call if body.respond_to?(:call)
            template.new(path, line.to_i, options) { body }
          else
            found = false
            @preferred_extension = engine.to_s
            find_template(views, data, template) do |file|
              path ||= file # keep the initial path rather than the last one
              if found = File.exist?(file)
                path = file
                break
              end
            end
            throw :layout_missing if eat_errors and not found
            template.new(path, 1, options)
          end