# File lib/omniauth/strategies/oauth2/facebook.rb, line 16
      def initialize(app, client_id=nil, client_secret=nil, options = {}, &block)
        client_options = {
          :site => 'https://graph.facebook.com/',
          :token_url => '/oauth/access_token'
        }

        options = {
          :parse => :query
        }.merge(options)

        super(app, :facebook, client_id, client_secret, client_options, options, &block)
      end