NewPoller returns a new Poller.

Cache contains raw split data as well as the data in serialized format.

Poller implements Fetcher and contains cache pointer, splitio, and required info to interact with aplitio api.

SplitCachePreload contains the same information as SplitData but in string format.

SplitData contains Splits and Segments which is supposed to be updated periodically.

Fetcher is an interface contains GetSerializedData, Start and Stop functions.