Function new_correlation_id 

pub fn new_correlation_id() -> String

Generates a new random correlation ID for use in read requests.

You must use the same correlation ID for all read segment column and read segment deletion requests of a single segment at a point in time, or else the data returned might not be consistent. Using the same correlation ID when reading different segments or the same segment at different points in time (e.g. separated by hours) can result in errors or inconsistent data. Therefore, calling this function once each time you need to read a segment is the best option.