InstancioMetamodel (Instancio Core 1.3.3 API)

```
@Target(TYPE)
@Retention(SOURCE)
public @interface InstancioMetamodel
```
This annotation provides support for generating metamodels for classes in order to avoid referencing fields as literal strings.
For example, instead of:
```
 Person person = Instancio.of(Person.class)
     .supply(field(Address.class, "city"), () -> "Paris")
     .create();
 
```
you would write:
```
 Person person = Instancio.of(Person.class)
     .supply(Address_.city, () -> "Paris")
     .create();
 
```
Metamodels can be generated by placing @InstancioMetamodel annotation on a class, for instance a JUnit test class, and activating the Instancio annotation processor in your build (see documentation for Maven and Gradle examples).
```
 @InstancioMetamodel(classes = {Address.class, Person.class})
 class PersonTest {
     // ... snip
 }
 
```
Note: if you need the same metamodels in multiple test classes, it is recommended to create a separate class containing the @InstancioMetamodel annotation, for example:
```
 @InstancioMetamodel(classes = {Address.class, Person.class})
 interface SampleConfig { /* empty */ }
 
```
The reason for this is that duplicating the annotation for the same 'classes' will cause metamodels for those classes to be generated more than once.

- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  Class<?>[] classes
  Classes for which metamodel should be generated.

- Element Detail
  - classes
```
Class<?>[] classes
```
    Classes for which metamodel should be generated.
    
    Returns:
    
    classes to generate metamodels for
    
    Default:
    
    {}