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: health_checker.rb
    path of file: ./repos/vets-api/modules/va_forms/lib/va_forms
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require 'central_mail/service'

module VAForms
  class Healt
    
    def healthy_service?(service)
      case service.upcase

      when CMS_SERVICE.upcase
        cms_is_healthy?
      else
        raise "VAForms::HealthChecker doesn't recognize #{service}"
      end
    end