Check if it is safe to write to this #GstUri.
Check if the refcount of @uri is exactly 1, meaning that no other reference exists to the #GstUri and that the #GstUri is therefore writable.
Modification of a #GstUri should only be done after verifying that it is writable.
%TRUE if it is safe to write to the object.
1.6
See Implementation
Check if it is safe to write to this #GstUri.
Check if the refcount of @uri is exactly 1, meaning that no other reference exists to the #GstUri and that the #GstUri is therefore writable.
Modification of a #GstUri should only be done after verifying that it is writable.