StarTree (Pinot Segment Service Provider Interface 0.12.1 API)

```
public interface StarTree
```
Interface for StarTree.

Method Summary

Modifier and Type	Method	Description
`List<String>`	`getDimensionNames()`	Get a list of all dimension names.
`StarTreeNode`	`getRoot()`	Get the root node of the star tree.
`void`	`printTree(Map<String,Dictionary> dictionaryMap)`	Print the tree.

- Method Detail
  - getRoot
```
StarTreeNode getRoot()
```
    Get the root node of the star tree.
  - getDimensionNames
```
List<String> getDimensionNames()
```
    Get a list of all dimension names. The node dimension id is the index of the dimension name in this list.
  - printTree
```
void printTree(Map<String,Dictionary> dictionaryMap)
```
    Print the tree.