Re #9483. Removing using directives from headers.
Re #9483. Removing using directives from headers.
Re #9483. Moving code from header to source file.
Re #9483. Droped many more using directives from headers.
Re #9483. Fixing unit tests that don't compile.
Re #9483. Getting rid of cppcheck warnings.
Re #9483. Getting rid of doxygen warnings.
Re #9483. Getting rid of doxygen warnings.
Re #9483. Getting rid of doxygen warnings.
Merge remote branch 'origin/feature/9483_using_headers'