should return nil when it does not add a new entry
tree3757de05d81f3287cde0819c7e641ee805f7aea6
-rw-r--r-- 2716 BUILD
-rw-r--r-- 6190 CMakeLists.txt
-rw-r--r-- 1097 LICENSE
-rw-r--r-- 1236 README
drwxr-xr-x - common
drwxr-xr-x - cpptoxml
drwxr-xr-x - generator
drwxr-xr-x - lua
drwxr-xr-x - old_bindings
drwxr-xr-x - test
drwxr-xr-x - xslt