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

Given an integer array nums sorted in non-decreasing order and an integer target, return true if target is a majority element, or false otherwise.
A majority element in an array nums is an element that appears more than nums.length / 2 times in the array.
 
Please complete the following python code precisely:
```python
class Solution:
    def isMajorityElement(self, nums: List[int], target: int) -> bool:
```