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: templates.rb
    path of file: ./repos/angelo/lib/angelo
    
    the code of the file until where you have to start completion: require 'tilt'

module Angelo
  module Templates

    # When this code refers to Tilt, use ::Tilt not Angelo::Tilt.

    Tilt = ::Tilt

    # Add instance methods to render views with each template engine
    # I'm using.  The methods are called "haml", "markdown", etc.

    # They render files (Symbols) or Strings, with no frills other
    #
    
      def instantiate_template_from_string(template_type, string, opts)
        # To make Tilt use a String as a template we pass Tilt.new a
        # block that returns the String.  Passing a block makes
        # Tilt.new ignore the file argument.  Except the file argument
        # is still used to figure out which template engine to use.
        # Fortunately we can just pass template_type, except the file
        # argument needs to respond to to_str and symbols don't
        # respond to that so we convert it to a String.
        Tilt.new(template_type.to_s, opts) {string}
      end

      def find_view_file_for_template_type(views, name, template_type)
        template_class = Tilt[template_type]
        exts = Tilt.default_mapping.extensions_for(template_class).uniq
        filenames = exts.map{|ext| File.join(views, "#{name}.#{ext}")}
        filenames.find{|f| File.exists?(f)}
      end
    end