[GraphHopper] Tutorial for InstructionList usage

[Laura Barroso]

Hello everyone, I being searching for a tutorial about the usage of
InstructionList, however the only example I have being able to find is
https://github.com/graphhopper/graphhopper/blob/master/docs/core/routing.md
and when I try to make a call to createDescription it appears to be
undefined...is there any tutorial at all that could point me on the right
direction? Im using graphhoper for android.Thanks in advance.