Location.helloHome.execute

I am studying the code of “Take Out Dog” SmartApp. There are statement accessing some unknown location members, such as helloHome and then calling execute. I did not find anything in the docs about this. Does anyone know what it means?

It appears to be used for executing routines. I found this when doing a search for “execute” in the docs:
http://docs.smartthings.com/en/latest/smartapp-developers-guide/routines.html#execute-routines