private static BacNetObject createAccessUser() {
        return b("Access User",
            p("Object_Identifier", "BACnetObjectIdentifier", c(R)),
            p("Object_Name", "CharacterString", c(R)),
            p("Object_Type", "BACnetObjectType", c(R)),
            p("Description", "CharacterString", c(O)),
            p("Global_Identifier", "Unsigned32", c(W)),
            p("Status_Flags", "BACnetStatusFlags", c(R)),
            p("Reliability", "BACnetReliability", c(R)),
            p("User_Type", "BACnetAccessUserType", c(R)),
            p("User_Name", "CharacterString", c(O)),
            p("User_External_Identifier", "CharacterString", c(O)),
            p("User_Information_Reference", "CharacterString", c(O)),
            p("Members", "BACnetLIST of BACnetDeviceObjectReference", c(O)),
            p("Member_Of", "BACnetLIST of BACnetDeviceObjectReference", c(O)),
            p("Credentials", "BACnetLIST of BACnetDeviceObjectReference", c(R)),
            p("Reliability_Evaluation_Inhibit", "BOOLEAN", c(O)),
            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