SchemaFieldNumber (core 2.44.0 API)

```
@Documented
@Retention(RUNTIME)
@Target({FIELD,METHOD})
@Experimental(SCHEMAS)
public @interface SchemaFieldNumber
```
When used on a POJO field, a Java Bean getter, or an AutoValue getter, the generated field will have the specified index. There cannot be "gaps" in field numbers, or schema inference will fail. If used, all fields (or getters in the case of a bean) must be annotated.
For example, say we have a Java POJO with a field that we want in our schema but under a different name:
```
  @DefaultSchema(JavaFieldSchema.class)
   class MyClass {
     @SchemaFieldNumber(1)
     public String user;

    @SchemaFieldNumber(0)
     public int ageInYears;
   }
 
```
The resulting schema will have ageInYears first followed by user.

- Required Element Summary
  
  Required Elements
  Modifier and Type Required Element Description
  
  java.lang.String value
  The name to use for the generated schema field.

- Element Detail
  - value
```
@Nonnull
java.lang.String value
```
    The name to use for the generated schema field.