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

Given two integer arrays nums1 and nums2, sorted in non-decreasing order, return the minimum integer common to both arrays. If there is no common integer amongst nums1 and nums2, return -1.
Note that an integer is said to be common to nums1 and nums2 if both arrays have at least one occurrence of that integer.
 
Please complete the following python code precisely:
```python
class Solution:
    def getCommon(self, nums1: List[int], nums2: List[int]) -> int:
```