refer to the following post (description of the problem and proposed solution):
http://groups.google.com/group/protobuf/browse_thread/thread/e3909450a1fb1a21
Issue 9668: null values should be treated as no values
Created 15 years, 5 months ago by aantono
Modified 14 years, 9 months ago
Reviewers: kenton, jcattell_orbitz.com
Base URL: http://protobuf.googlecode.com/svn/trunk
Comments: 0