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

Given an array of positive integers arr, find a pattern of length m that is repeated k or more times.
A pattern is a subarray (consecutive sub-sequence) that consists of one or more values, repeated multiple times consecutively without overlapping. A pattern is defined by its length and the number of repetitions.
Return true if there exists a pattern of length m that is repeated k or more times, otherwise return false.
 
Please complete the following python code precisely:
```python
class Solution:
    def containsPattern(self, arr: List[int], m: int, k: int) -> bool:
```