// objective: test the \internal and \endinternal commands (2)
// check: indexpage.xml
// config: INTERNAL_DOCS = YES
/** \mainpage
* Some text.
* \internal
* Internal text.
* \endinternal
* \section s1 A Section
* Some text in the section 1.
* \internal
* Internal text.
* \subsection ss1 A Subsection
* Some text in the subsection.
* \endinternal
* Visible text in section 1.
* \section s2 Another Section
* Visible text.
*/