tree 5fd60b442b0a27ddff2b978df8b4dc1c4627d635
parent 32a7e298da03c126a10547b82cacbc5e694e2cdb
author Keith Batten <kbatten@gmail.com> 1384122162 -0800
committer Keith Batten <kbatten@gmail.com> 1384122520 -0800

add type assertion example