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: validate_url.rb
    path of file: ./repos/forem/app/services/feeds
    
    the code of the file until where you have to start completion: module Feeds
  class ValidateUrl
    def self.call(f
    
    def call
      return false if feed_url.blank?

      xml = HTTParty.get(feed_url,
                         timeout: 10,
                         headers: { "User-Agent" => "Forem Feeds Importer" }).body
      Feedjira.parse(xml)

      true
    rescue Feedjira::NoParserAvailable
      false
    end