DW3000 API: Subsidiary functions


I am trying to port a ranging application from DW1000 to DW3000. Te original code used the direct register read and write functions, such as dwt_read32bitreg() and dwt_write32bitreg().

While these functions are documented in the DW3000 API Guide under the Subsidiary functions category, they seem no to be accesible in the API.
Am I doing anything wrong or I am right and the API documentation is not reliable, as it documents non existing functions?

Regards, and thank you.