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

require 'lighthouse/facilities/client'

module MedicalCopays
  ##
  # Object for building a list of the user's zero balance statements
  #
  # @!attribute facility_hash
  # @!attribute statements
  # @return [Array<Hash>]
  #
  class ZeroBalanceStatements
    attr_reader :facility
    
    def list
      facilities.map do |facility|
        {
          'pH_AMT_DUE' => 0,
          'pS_STATEMENT_DATE' => Time.zone.today.strftime('%m%d%Y'),
          'station' => {
            'facilitY_NUM' => facility['id'].sub('vha_', ''),
            'city' => facility['address']['physical']['city'].upcase
          }
        }
      end
    end