wu-sheng commented on issue #9999:
URL: https://github.com/apache/skywalking/issues/9999#issuecomment-1374820652
```
public static void inject(Object message) {
}
public static void extract(Object message) {
}
```
Don't use `Object` as parameter, it is too general.
```
public static ContextSnapshot capture() {
return null;
}
public static void continued(ContextSnapshot snapshot) {
}
```
Don't return null, you could create a dummy implementation to avoid NPE.
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