How to create an ExtensionObject?

[yongzhi0113]

Reviewing your project,
the inputArgument and outputArgument under the method node do not have values assigned.

I need to create a method. How can I assign values to the arguments below?
I assume it involves using ExtensionObject to assign values, but I don't know how to create an ExtensionObject.
Could you please explain how to do it?

[nauful]

Here are some samples for handling method calls:
#23
#29

ExtensionObjects are for more complex data types. If you're fine with the regular types and arrays, you won't need those.