Returns a specified number of contiguous elements from the end of an observable sequence, using an optional scheduler to drain the queue.
This operator accumulates a buffer with a length enough to store elements count elements. Upon completion of the source sequence, this buffer is drained on the result sequence. This causes the elements to be delayed.
Number): Number of elements to bypass at the end of the source sequence.
Observable): An observable sequence containing the source sequence elements except for the bypassed ones at the end.