# File lib/httpclient/ssl_config.rb, line 114
    def set_client_cert_file(cert_file, key_file)
      @client_cert = X509::Certificate.new(File.open(cert_file) { |f| f.read })
      @client_key = PKey::RSA.new(File.open(key_file) { |f| f.read })
      change_notify
    end