private static BacNetObject createGroup() {
        return b("Group",
            p("Object_Identifier", "BACnetObjectIdentifier", c(R)),
            p("Object_Name", "CharacterString", c(R)),
            p("Object_Type", "BACnetObjectType", c(R)),
            p("Description", "CharacterString", c(O)),
            p("List_Of_Group_Members", "BACnetLIST of ReadAccessSpecification", c(R)),
            p("Present_Value", "BACnetLIST of ReadAccessResult", c(R)),
            p("Property_List", "BACnetARRAY[N] of BACnetPropertyIdentifier", c(R)),
            p("Tags", "BACnetARRAY[N] of BACnetNameValue", c(O)),
            p("Profile_Location", "CharacterString", c(O)),
            p("Profile_Name", "CharacterString", c(O))
        );
    }
a map which maps property to type variants
protocols/bacnetip/src/test/java/org/apache/plc4x/protocol/bacnetip/BACnetObjectsDefinitions.java