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: evss_claims_sync_status_tracker.rb
    path of file: ./repos/vets-api/app/models
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

class EVSSClaimsSyncStatusTracker < Common::RedisStore
  redis_store REDIS_CONFIG[:evss_claims_store][:name
    
  def single_record_key
    arr = []
    arr << 'claim_id' unless claim_id
    arr << 'user_uuid' unless user_uuid

    unless arr.empty?
      raise Common::Exceptions::InternalServerError, ArgumentError.new(
        "EVSSClaimsRedisHelper#single_record_key was called without having set a #{arr.join(', ')}"
      )
    end