NonNullByDefault (wear-kernel 2.0.3 API)

```
@Documented
@Retention(RUNTIME)
@Target({PACKAGE,TYPE,METHOD,CONSTRUCTOR})
public @interface NonNullByDefault
```
Indicates that all fields, method return values or parameters can never be null in the annotated package or type.
This rule can be overridden on each element by using Nullable annotation.

- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  boolean value
  When annotating an element with @NonNullByDefault(false), the default null annotation is not applied.

- Element Detail
  - value
```
boolean value
```
    When annotating an element with @NonNullByDefault(false), the default null annotation is not applied. In this case, the appropriate annotation must be specified to each sub-element (@Nullable or @NotNull or none).
    
    Returns:
    
    true by default
    
    Default:
    
    true