CollectionId (hibernate-core JavaDocs)

```
@Target({METHOD,FIELD})
@Retention(RUNTIME)
public @interface CollectionId
```
Describe an identifier column for a bag (ie an idbag). EXPERIMENTAL: the structure of this annotation might slightly change (generator() mix strategy and generator

Optional Element Summary

Optional Elements
Modifier and Type	Optional Element	Description
`Column`	`column`	The column containing the collection-id
`String`	`generator`	The generator name.
`Class<? extends IdentifierGenerator>`	`generatorImplementation`	Implementation for generating values

- Element Detail
  - column
```
Column column
```
    The column containing the collection-id
    
    Default:
    
    @jakarta.persistence.Column
- - generatorImplementation
```
Class<? extends IdentifierGenerator> generatorImplementation
```
    Implementation for generating values
    
    "API Note:"
    
    Mutually exclusive with generator()
    
    Default:
    
    org.hibernate.id.IdentifierGenerator.class
- - generator
```
String generator
```
    The generator name. Can specify either a built-in strategy ("sequence", e.g.) or a named generatorIdentifierGenerator (SequenceGenerator, e.g.)
    
    "API Note:"
    
    Mutually exclusive with generatorImplementation() ()}
    
    Default:
    
    ""