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: dump_import.rb
    path of file: ./repos/qpixel/scripts/import
    
    the code of the file until where you have to start completion: class DumpImport
  def self.posts_field_map(community_id, category_id, site_domain)
    {
      id: :id,
      post_type_id: :post_type_id,
      created_at: :cre
    
  def self.do_xml_transform(site_domain, data_type, options)
    dump_path = options.path
    community_id = options.community
    category_id = options.category

    input_file_path = File.join(dump_path, "#{data_type}.xml")
    output_file_path = Rails.root.join('import-data', "#{data_type}_Formatted.xml")

    field_map = case data_type
                when 'Posts'
                  DumpImport.posts_field_map(community_id, category_id, site_domain)
                when 'Users'
                  DumpImport.users_field_map(site_domain)
                else
                  raise ArgumentError, "Unsupported data type #{data_type.inspect}"
                end