    # File lib/fog/openstack/requests/identity/list_tenants.rb, line 5
            def list_tenants(limit = nil, marker = nil)
              params = Hash.new
              params['limit']  = limit  if limit
              params['marker'] = marker if marker

              request(
                :expects => [200, 204],
                :method  => 'GET',
                :path    => "tenants",
                :query   => params
              )
            end