VisibleForTesting (PerfectLibCameraKit)

```
@Retention(SOURCE)
public @interface VisibleForTesting
```
Denotes that the class, method or field has its visibility relaxed, so that it is more widely visible than otherwise necessary to make code testable.
You can optionally specify what the visibility should have been if not for testing; this allows tools to catch unintended access from within production code.
Example:
```
  @VisibleForTesting(otherwise = VisibleForTesting.PROTECTED)
  public String printDiagnostics() { ... }
 
```
If not specified, the intended visibility is assumed to be private.

Field Summary

Fields
Modifier and Type	Fields	Description
`static int`	`NONE`	The annotated element should never be called from production code, only from tests.
`static int`	`PACKAGE_PRIVATE`	The annotated element would have "package private" visibility
`static int`	`PRIVATE`	The annotated element would have "private" visibility
`static int`	`PROTECTED`	The annotated element would have "protected" visibility

Optional Element Summary

Optional Elements
Modifier and Type Optional Element Description

int otherwise
The visibility the annotated element would have if it did not need to be made visible for testing.

- Field Detail
  - PRIVATE
```
static final int PRIVATE
```
    The annotated element would have "private" visibility
- - PACKAGE_PRIVATE
```
static final int PACKAGE_PRIVATE
```
    The annotated element would have "package private" visibility
- - PROTECTED
```
static final int PROTECTED
```
    The annotated element would have "protected" visibility
- - NONE
```
static final int NONE
```
    The annotated element should never be called from production code, only from tests.
    This is equivalent to @RestrictTo.Scope.TESTS.
- Element Detail
  - otherwise
```
int otherwise
```
    The visibility the annotated element would have if it did not need to be made visible for testing.
    
    Default:
    
    2