# File lib/fog/compute/openstack/requests/get_usage.rb, line 5
        def get_usage(tenant_id, date_start, date_end)
          params = {}
          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