Missing Example for ToolHandleArray

There seems to be no test/example of ToolHandleArray usage outside of Athena except for one member in GaudiExamples/MyGaudiAlgorithm that isn't used in the corresponding options file. I tried to use it like this:

vavolkl/Gaudi@a1abfb7d

but it fails with

JobOptionsSvc       ERROR Unable to set the property 'MyToolHandleArray' of 'MyGaudiAlg'. Check option and algorithm names, type and bounds.

Any help appreciated!