How to exclude private headers from showing up in source browser?

I have set SOURCE_BROWSER = NO and VERBATIM_HEADERS = YES because I want clients to be able to see the header files. However, I only want to allow them to see certain headers. How is the best way to do this.

Thanks in advance for any help!

EDIT: This appears to work, but I would b开发者_如何学Goe interested in any other better ways.

EXCLUDE_PATTERNS       = */.svn/* *debug* *impl* *boost*

If \internal tag does not work, you can try \cond ... \endcond tags for marking a portion of code to be hidden from Doxygen.