removeAt method Null safety
- int index
Removes the object at position
index from this list.
This method reduces the length of
this by one and moves all later objects
down by one position.
Returns the removed object.
index must be in the range
0 ≤ index < length.
Throws an UnsupportedError if this is a fixed-length list. In that case the list is not modified.
external E removeAt(int index);