clang-uml diagrams can be easily added to the Doxygen documentation using the image tag, however
Doxygen does not support the clang-uml specific commands.
clang-uml decorators can be omitted completely in Doxygen, by adding the
following lines to the Doxygen config file:
ALIASES += uml=""
ALIASES += uml{1}=""
ALIASES += uml{2}=""
ALIASES += uml{3}=""