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: builtin.rb
    path of file: ./repos/travis-build/lib/travis/build/env
    
    the code of the file until where you have to start completion: require 'shellwords'
require 'travis/build/env/base'

module Travis
  module Build
    class Env
      class Builtin < Base
        def_delegators :data, :build, :job, :repository, :pull_request

        RUNTIME_VA
    
          def env_vars
            {
              TRAVIS:                 true,
              CI:                     true,
              CONTINUOUS_INTEGRATION: true,
              PAGER:                  'cat',
              HAS_JOSH_K_SEAL_OF_APPROVAL: true,
              TRAVIS_ALLOW_FAILURE:   job[:allow_failure],
              TRAVIS_EVENT_TYPE:      build[:event_type],
              TRAVIS_PULL_REQUEST:    pull_request || false,
              TRAVIS_SECURE_ENV_VARS: env.secure_env_vars? || false,
              TRAVIS_BUILD_ID:        build[:id],
              TRAVIS_BUILD_NUMBER:    build[:number],
              TRAVIS_BUILD_DIR:       repository[:slug],
              TRAVIS_BUILD_WEB_URL:   "https://#{data[:host]}/#{repository[:slug]}/builds/#{build[:id]}",
              TRAVIS_JOB_ID:          job[:id],
              TRAVIS_JOB_NAME:        job[:name],
              TRAVIS_JOB_NUMBER:      job[:number],
              TRAVIS_JOB_WEB_URL:     "https://#{data[:host]}/#{repository[:slug]}/jobs/#{job[:id]}",
              TRAVIS_BRANCH:          job[:branch],
              TRAVIS_COMMIT:          job[:commit],
              TRAVIS_COMMIT_MESSAGE: '$(test -d .git && git log --format=%B -n 1 | head -c 32768)',
              TRAVIS_COMMIT_RANGE:    job[:commit_range],
              TRAVIS_REPO_SLUG:       repository[:slug],
              TRAVIS_REPO_PRIVATE:    repository[:private],
              TRAVIS_OSX_IMAGE:       config[:osx_image],
              TRAVIS_LANGUAGE:        config[:language],
              TRAVIS_TAG:             job[:tag],
              TRAVIS_SUDO:            (!!!data[:paranoid]).to_s,
              TRAVIS_BUILD_STAGE_NAME: job[:stage_name],
              TRAVIS_PULL_REQUEST_BRANCH: job[:pull_request_head_branch],
              TRAVIS_PULL_REQUEST_SHA: job[:pull_request_head_sha],
              TRAVIS_PULL_REQUEST_SLUG: job[:pull_request_head_slug],
            }
          end