tree 6a963fbbcd230a957d706c813e6ed9256f9803b8
parent f4666459f11c5a0840a4458174ab971271b5de1e
author Masatake Iwasaki <iwasakims@example.com> 1397575916 -0700
committer Masatake Iwasaki <iwasakims@example.com> 1397575916 -0700

added description about span receivers to doc.