Function isRoot

isRoot<A>(zipper: Zipper.Zipper<A>): boolean
True if the zipper is currently focused on the tree root node.
Type Parameters
- A
  Underlying tree type.
Parameters
- zipper: Zipper.Zipper<A>
  Zipper to be queried.
Returns boolean
True if zipper is at root else false.
Example
```
import {Zipper, from, of} from 'effect-tree'

const tree = from(1, of(2), of(3))

const zipper = Zipper.fromTree(tree)

expect(Zipper.isRoot(zipper)).toBe(true)

const moved = Zipper.head(zipper)

expect(Zipper.isRoot(moved)).toBe(false)
```
- Defined in src/zipper/data.ts:223