[Question] What's the difference between matcher and pattern in spoon?

From my understanding, the matcher could be used to search a code block. And the pattern is used to search a single statement or invocation. If there is a chance, could you provide more rich cases on the official site?

And I have some cases in pseudocode that need to use matcher / pattern to search in the code base. Could you tell me if they can be matched use matcher / pattern in spoon?

- Case1
`javax.crypto.Cipher.getInstance("AES")`

I know it's easy to use `invocation.getExecutable().getParameters()` to limit the parameter value. But is there any chance to use matcher / pattern?

- Case2
```java
public class $JMS_LISTENER implements javax.jms.MessageListener {
...
public void onMessage(javax.jms.Message $JMS_MSG) {
...
}
}
```

- Case3
```java
org.apache.commons.text.StringSubstitutor.createInterpolator().replace(...)
```

Start with the official Spoon documentation for matcher and pattern, then review how the APIs apply to the three Java cases in the issue: a Cipher invocation, a JMS listener class, and StringSubstitutor.createInterpolator().replace(...). Done means the documentation distinguishes matcher from pattern, includes richer examples, and explains whether these cases can be matched.

Written by the indexing model from the issue text.