Missing shh.subscribe function on Whisper protocol

[avatar-lavventura]

Whisper Protocol in original has a subscribe function, please see the Whisper-v5-RPC-API.

shh_subscribe

Creates and registers a new subscription to receive notifications for inbound whisper messages. Returns the ID of the newly created subscription.

But Web3.py seems like does not have shh.subscribe function on its documentation and implementation.

=> Would it be implemented? or is it not implemented in purpose?

[carver]

Only whisper v6 is supported, since #784