ActionView::Template::Handlers::Builder Ruby on Rails 5.1.2 Class ActionView::Template::Handlers::Builder < Object actionview/lib/action_view/template/handlers/builder.rb Methods C call R require_engine Instance Public methods call(template) Link Source: show | on GitHub # File actionview/lib/action_view/template/handlers/builder.rb, line 8 def call(template) require_engine "xml = ::Builder::XmlMarkup.new(:indent => 2);" "self.output_buffer = xml.target!;" + template.source + ";xml.target!;" end Instance Private methods require_engine() Link Source: show | on GitHub # File actionview/lib/action_view/template/handlers/builder.rb, line 18 def require_engine # :doc: @required ||= begin require "builder" true end end