    # File lib/fog/openstack/requests/compute/get_usage.rb, line 6
            def get_usage(tenant_id, date_start, date_end)
              params = Hash.new
              params[:start] = date_start.utc.iso8601.chop!
              params[:end]   = date_end.utc.iso8601.chop!
              request(
                :expects  => [200, 203],
                :method   => 'GET',
                :path     => "os-simple-tenant-usage/#{tenant_id}",
                :query    => params
              )
            end