How to get arguments info from CallExpression?

I have a bit of code like:
```
Example({
test(ctx) {
function abc(){}
abc()
return ctx.request;
}
});
```
I want to get this call expression's detail, for example, whether it has arguments, number of arguments and arguments type.

How can I get these info?

Start at the CallExpression entry point and read the ts-morph API documentation for inspecting calls and their arguments. Determine how the example call can expose whether arguments exist, their count, and their types; done means providing a clear, supported usage example or documenting any missing API.

Written by the indexing model from the issue text.