Is it possible to load and use both dialog and ims_dialog modules in the same server ?

Even though ims_dialog docs says ims_dialog extends dialog module, I do see that some of the dialog module features are not present in ims_dialog. Example, wait_ack , track_cseq_updates are not present  in ims_dialog. 

I have requirements to use ims_dialog mainly for ims_charging module and dialog module with wait_ack  and track_cseq_updates  parameters are enabled.

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