How to structure output for build log so it is foldable/expandable

Following off of the documentation at http://confluence.jetbrains.net/display/TCD7/Build+Script+Interaction+with+TeamCity, I found that the following worked (this is from a batch script):

echo ##teamcity[blockOpened name='Parsing Parameters']
echo message inside Parsing Parameters
echo ##teamcity[blockClosed name='Parsing Parameters']

Alternatively, you can do

echo ##teamcity[progressStart 'Parsing Parameters']
echo message inside Parsing Parameters

echo ##teamcity[progressFinish 'Parsing Parameters']

The block method works better, in my experience, because it handles linebreaks in the output and gives a running tally of the time spent on a task.