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

require 'pdf_fill/forms/va21p527ez'
require 'pdf_fill/forms/va21p530'
require 'pdf_fill/forms/va214142'
require 'pdf_fill/forms/va210781a'
require 'pdf_fill/forms/va210781'
require 'pdf_fill/forms/va218940'
require 'pdf_fill/forms/va1
    
    def combine_extras(old_file_path, extras_generator)
      if extras_generator.text?
        file_path = "#{old_file_path.gsub('.pdf', '')}_final.pdf"
        extras_path = extras_generator.generate

        PDF_FORMS.cat(old_file_path, extras_path, file_path)

        File.delete(extras_path)
        File.delete(old_file_path)

        file_path
      else
        old_file_path
      end