How to I check whether a certain key can be found in the settings heirarchy?

[JAQuent]

I'd like to check if my session .json contains a certain key (e.g. objectRotationSpeed) and use that value if it exists and assign a default value if it doesn't. For that I have to check whether the key objectRotationSpeed exists in the settings heirarchy but I don't know how to do this.

Something like:

if(session.settings.GetFloat("objectRotationSpeed") == null){
\\\\ Assigning default value
}

But if I do this I get the following error: KeyNotFoundException: The key "objectRotationSpeed" was not found in the settings heirarchy. Use UXF Session Debugger (UXF menu at top of unity editor) to check your settings are being applied correctly.

[JAQuent]

I've tried to use this https://learn.microsoft.com/en-us/dotnet/api/system.collections.generic.dictionary-2.keycollection?view=net-8.0 by accessing session.settings.Keys.Contains(key) because session.settings.Keys seem to be a 'Dictionary<string, object>.KeyCollection' , however I still get

error CS1061: 'Dictionary<string, object>.KeyCollection' does not contain a definition for 'Contains' and no accessible extension method 'Contains' accepting a first argument of type 'Dictionary<string, object>.KeyCollection' could be found (are you missing a using directive or an assembly reference?)

[JAQuent]

This works

        foreach(var key in session.settings.Keys){
            Debug.Log(key);
        }