addPossiblyNullObject(((ExecuteTaskRulesCommand) cmdObj).getData(), extraClassInstanceList); } else if( cmdObj instanceof ProcessSubTaskCommand ) { addPossiblyNullObject(((ProcessSubTaskCommand) cmdObj).getData(), extraClassInstanceList); } else if( cmdObj instanceof SetProcessInstanceVariablesCommand ) { addPossiblyNullObject(((SetProcessInstanceVariablesCommand) cmdObj).getVariables(), extraClassInstanceList);