split
(DOC) Splits payload objects into a variable number of equally sized pieces.
The caller provides a function which, for each object, decides how many pieces it should be split into. If it returns 1, the object will be unchanged.
Parameters
f
a function that decides how many pieces each object should be split into
Throws
if f returns a number less than 1, or a number greater than the number of microseconds contained in the object's interval