TagClusterReducer (Solr 9.6.0 core API)

```
public interface TagClusterReducer
```

- Field Summary
  
  Fields
  Modifier and Type Field Description
  
  static TagClusterReducer ALL
  
  static TagClusterReducer LONGEST_DOMINANT_RIGHT
  
  static TagClusterReducer NO_SUB
- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  void reduce(TagLL[] head)
  Reduces the linked-list to only those tags that should be emitted

- Field Detail
  - ALL
```
static final TagClusterReducer ALL
```
  - NO_SUB
```
static final TagClusterReducer NO_SUB
```
  - LONGEST_DOMINANT_RIGHT
```
static final TagClusterReducer LONGEST_DOMINANT_RIGHT
```
- Method Detail
  - reduce
```
void reduce(TagLL[] head)
```
    Reduces the linked-list to only those tags that should be emitted
    
    Parameters:
    
    head - not null; 1-element array to head which isn't null either