Missing mod_voicemail_callpage

Hi, I want to implement a script that calls a user when a new message is left in the voicemail. And I found in confluence reference to an interesting module voicemail callpage that places a call to a destination when new messages are present in a voicemail box: https://freeswitch.org/confluence/display/FREESWITCH/mod_voicemail_callpage <https://freeswitch.org/confluence/display/FREESWITCH/mod_voicemail_callpage> But this module is not present at source code (I couldn’t found ..) Is it only available for commercial solutions? Thanks, António