Force the namespace namespace_ to be loaded if it isn't already.
If namespace_ is not loaded, this function will search for a ".typelib" file using the repository search path. In addition,
a version version of namespace may be specified. If version is not specified, the latest will be used.
| this |
A Repository or null for the singleton process-global default Repository |
| namespace_ |
GI namespace to use, e.g. "Gtk" |
| version |
Version of namespace, may be null for latest |
| flags |
Set of girepositoryloadflags, may be 0 |
|
a pointer to the Typelib if successful, null otherwise |