# File lib/fog/network/openstack/requests/update_subnet_pool.rb, line 5
        def update_subnet_pool(subnet_pool_id, options = {})
          data = {'subnetpool' => {}}

          vanilla_options = [:name, :description, :prefixes, :address_scope_id,
                             :min_prefixlen, :max_prefixlen, :default_prefixlen]
          vanilla_options.select { |o| options.key?(o) }.each do |key|
            data['subnetpool'][key] = options[key]
          end

          request(
            :body    => Fog::JSON.encode(data),
            :expects => 200,
            :method  => 'PUT',
            :path    => "subnetpools/#{subnet_pool_id}"
          )
        end