Please solve the programming task below using a self-contained code snippet in a markdown code block.

Given an integer array nums and an integer k, return true if there are two distinct indices i and j in the array such that nums[i] == nums[j] and abs(i - j) <= k.
 
Please complete the following python code precisely:
```python
class Solution:
    def containsNearbyDuplicate(self, nums: List[int], k: int) -> bool:
```