After #588 the next step is to consider the future/structure of the added `cif2plc` model classes. Added files in #588 : ``` model/declarations/PlcConfiguration.java model/declarations/PlcGlobalVarList.java model/declarations/PlcPou.java model/declarations/PlcPouInstance.java model/declarations/PlcPouType.java model/declarations/PlcProject.java model/declarations/PlcResource.java model/declarations/PlcTask.java model/declarations/PlcTypeDecl.java model/declarations/PlcVariable.java model/expressions/PlcValue.java model/types/PlcArrayType.java model/types/PlcDerivedType.java model/types/PlcElementaryType.java model/types/PlcEnumType.java model/types/PlcStructType.java model/types/PlcType.java options/ConvertEnums.java options/ConvertEnumsOption.java options/ElimEnumsOption.java options/PlcConfigurationNameOption.java options/PlcFormalFuncInvokeArg.java options/PlcFormalFuncInvokeArgOption.java options/PlcFormalFuncInvokeFunc.java options/PlcFormalFuncInvokeFuncOption.java options/PlcMaxIterOption.java options/PlcNumberBits.java options/PlcProjectNameOption.java options/PlcResourceNameOption.java options/PlcTaskCycleTimeOption.java options/PlcTaskNameOption.java options/PlcTaskPriorityOption.java options/RenameWarningsOption.java options/SimplifyValuesOption.java writers/Iec611313Writer.java writers/OutputTypeWriter.java writers/PlcOpenXmlWriter.java writers/TwinCatWriter.java writers/tc6_xml_v201.xsd ``` Addresses #397