Method isBound

packages/context/src/context.ts:470–476

* Check if a key is bound in the context or its ancestors * @param key - Binding key

(key: BindingAddress)

   * @param key - Binding key
   */
  isBound(key: BindingAddress): boolean {
    if (this.contains(key)) return true;
    if (this._parent) {
      return this._parent.isBound(key);
    }
    return false;
  }

  /**
   * Get the owning context for a binding or its key