Hi! This operation is currently unavailable in our library. However, it can be added.
This can be done in two ways:

1. Make a fork and add new Operation. We will check your code and consider its inclusion in the next build.
2. Do not fork and wait until we develop such functionality ourselves. (It can take quite a time because the desired operation is beyond the scope of the planned support functions)
   2.1. To speed up the process of adding you can send us an example of the jsonrpc request and response.