kind: start
plm: 2.4.6 (20140917)
java: 1.8.0_05 (VM: Java HotSpot(TM) 64-Bit Server VM; version: 25.5-b02)
os: Windows 7 (version: 6.1; arch: amd64)
kind: switched
switchto: welcome.lessons.welcome.traversal.column.TraversalByColumn
lang: Java
exo: welcome.lessons.welcome.environment.Environment