Retrieves, but does not remove, the last element of this list, or returns {@code null} if this list is empty.
@return the last element of this list, or {@code null} if this list is empty
See Implementation
Retrieves, but does not remove, the last element of this list, or returns {@code null} if this list is empty.
@return the last element of this list, or {@code null} if this list is empty