What happens when .h & .cpp Doxygen tags conflict?

I have .h & .cpp files in my project that have /brief tags in both locations: what does doxygen do when there is a c开发者_运维问答onflict between the 2 potential locations for documentation?

It is in the documentation :

Having more than one brief or detailed description is allowed (but not recommended, as the order in which the descriptions will appear is not specified).

And the documentation for the brief command:

If multiple \brief commands are present they will be joined.