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The presence of an unused method may indicate a bug. This check highlights
_private_ methods which are unused and can be safely removed without considering
the impact on other source files.
## Suppression
Methods and fields which are used by reflection can be annotated with `@Keep` to
suppress the warning.
This annotation can also be applied to annotations, to suppress the warning for
any member annotated with that annotation:
```java
import com.google.errorprone.annotations.Keep;
@Keep
@Retention(RetentionPolicy.RUNTIME)
@interface Field {}
...
public class Data {
@Field private int a; // no warning.
...
}
```
All false positives can be suppressed by annotating the method with
`@SuppressWarnings("unused")` or prefixing its name with `unused`.
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