Decodes the SAL - Group Mod Message and encodes into a OF Library for the OFPT_GROUP_MOD Message. Input:SAL Layer Group command data.

Example usage:

 
 VersionDatapathIdConvertorData data = new VersionDatapathIdConvertorData(version);
 data.setDatapathId(datapathId);
 Optional<GroupModInputBuilder> ofGroup = convertorManager.convert(salGroup, data);