Where can I find in the docs of Rust Sdk how to add an argument with has type Option<ID>?

[spielcrypto]

I'm using Rust SDK and I try to execute a contract however I have issues in order to add a Option<ID> argument, I try several ways with SuiJsonValue unsuccessfully however although the argument is optional it throws error showing that ObjectID needs to start with 0x , also I tried to add ObjectID::from_str("None").unwrap() but fails,

Here is an example of the code where I try to execute a transaction of my contract and here the contract function that I'm calling

[github-actions[bot]]

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[spielcrypto]

Ok, I was able to execute tx changing the code like this however the tx fail on chain as it is possible to see here

[spielcrypto]

In the end I change my contract in order to avoid to have the Option type, and works