Function expand

packages/effect/src/internal/hashMap/node.ts:327–343

(
  edit: number,
  frag: number,
  child: Node<K, V>,
  bitmap: number,
  subNodes: Array<Node<K, V>>
)

}

function expand<K, V>(
  edit: number,
  frag: number,
  child: Node<K, V>,
  bitmap: number,
  subNodes: Array<Node<K, V>>
) {
  const arr = []
  let bit = bitmap
  let count = 0
  for (let i = 0; bit; ++i) {
    if (bit & 1) arr[i] = subNodes[count++]!
    bit >>>= 1
  }
  arr[frag] = child
  return new ArrayNode(edit, count + 1, arr)
}

function mergeLeavesInner<K, V>(
  edit: number,