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

A self-dividing number is a number that is divisible by every digit it contains.

For example, 128 is a self-dividing number because 128 % 1 == 0, 128 % 2 == 0, and 128 % 8 == 0.

A self-dividing number is not allowed to contain the digit zero.
Given two integers left and right, return a list of all the self-dividing numbers in the range [left, right] (both inclusive).
 
Please complete the following python code precisely:
```python
class Solution:
    def selfDividingNumbers(self, left: int, right: int) -> List[int]:
```