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

Given an array of non-negative integers arr, you are initially positioned at start index of the array. When you are at index i, you can jump to i + arr[i] or i - arr[i], check if you can reach any index with value 0.
Notice that you can not jump outside of the array at any time.
 
Please complete the following python code precisely:
```python
class Solution:
    def canReach(self, arr: List[int], start: int) -> bool:
```