* - key: string, eg "com.example.myextension"
* - keys: array of string, eg array("com.example.myextension1", "com.example.myextension2")
* using 'keys' should be more performant than making multiple API calls with 'key'
* - removeFiles: bool, whether to remove source tree; default: FALSE
*
* - key: string, eg "com.example.myextension"
* - keys: array of string, eg array("com.example.myextension1", "com.example.myextension2")
* using 'keys' should be more performant than making multiple API calls with 'key'
* - removeFiles: bool, whether to remove source tree; default: FALSE
*