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

Given an array points where points[i] = [xi, yi] represents a point on the X-Y plane, return true if these points are a boomerang.
A boomerang is a set of three points that are all distinct and not in a straight line.
 
Please complete the following python code precisely:
```python
class Solution:
    def isBoomerang(self, points: List[List[int]]) -> bool:
```