This TypeScript constructor initializes an object with a key of type K and an array of values of type V.
The key parameter is typically used to store a unique identifier or key for the
data being stored in the data structure. It helps in quickly accessing or retrieving the
associated value in the data structure.
The value parameter in the constructor represents an array of values of
type V.
Represents a node in a binary tree.
Template: BinaryTreeNode<K,
V> - The type of the family relationship in the binary tree.