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

Given an array of points on the X-Y plane points where points[i] = [xi, yi], return the area of the largest triangle that can be formed by any three different points. Answers within 10-5 of the actual answer will be accepted.
 
Please complete the following python code precisely:
```python
class Solution:
    def largestTriangleArea(self, points: List[List[int]]) -> float:
```