tree 6cc3b37c80cf1c783f886317f677aa9896be62da
parent 42f80bc5fb37b151627d56ce974c4c1c4eb58d15
author Tony Mack <tmack@cs.princeton.edu> 1426624646 -0400
committer Tony Mack <tmack@cs.princeton.edu> 1426624646 -0400

create logger for observer