ImmutableInfo (Buck)

```
@Target({TYPE,PACKAGE,ANNOTATION_TYPE})
@Retention(RUNTIME)
public @interface ImmutableInfo
```
Annotation marking a class as an immutable built in implementation of ProviderInfo.
This uses the immutable library to generate an implementation class that conforms to the requirements of providers declared in java.

Required Element Summary

Required Elements
Modifier and Type	Required Element	Description
`String[]`	`args`	TODO this is here because java reflection doesn't expose parameter names, and methods can't be retrieved in order of declaration.

Optional Element Summary

Optional Elements
Modifier and Type Optional Element Description

String[] defaultSkylarkValues

String[] noneable

- Element Detail
  - args
```
String[] args
```
    TODO this is here because java reflection doesn't expose parameter names, and methods can't be retrieved in order of declaration. We should just have some custom annotation processor to generate this.
    
    Returns:
    
    an array of Strings that represent the names of the constructor parameters in order of declared methods. This should be in the lower underscore naming convention for python.
- - defaultSkylarkValues
```
String[] defaultSkylarkValues
```
    Returns:
    
    an array of string representations of default values to use in the Starlark interpreter if a kwarg is not provided.
    
    Default:
    
    {}
- - noneable
```
String[] noneable
```
    Returns:
    
    an array of fields that should be noneable
    
    Default:
    
    {}