Options for spectreFormatter class when running batch si netlister

Hello, I am trying to find additional options for the spectreFormatter that can be specified from si.env file to modify the output.

Currently the main thing that I am looking for is the ability to enable the top level cell to be wrapped in a subckt call, but having all options would be great for future development.

Here is how I am currently running from the command line to produce the spectre netlist from a schematic:

\> cat run.sh
si -batch -command nl

\> cat si.env
simLibName = "sandbox_lib"
simCellName = "sandbox_cell"
simViewName = "schematic"
simSimulator = "spectre"
simNotIncremental = 't
simReNetlistAll = 't
simViewList = '("spectre" "config" "schematic" "veriloga")
simStopList = '("spectre")
simNetlistHier = 't
nlFormatterClass = 'spectreFormatter
nlCreateAmap = 't
nlDesignVarNameList = nil

Thank you.