#include <FWCore/Framework/interface/MessageForSource.h>
Description: Information passed from parent to source when doing multicore processing
Usage: This class is an internal detail of how the child process communicates with the parent. It is sent across a Unix socket to the parent to indicate that the child needs work.
Description: Information passed from controller to source when doing multicore processing
Usage: This class is an internal detail of how the parent process communicates to child processes. It is used with the posix sockets to send what events child processes should handle. The events are designated as a 'block' where we give the index to the first event in the block and then the number of consecutive events to process in the block.
NOTE: If the number of consecutive events (i.e. nIndices) is 0, this means there is no more work to do and the child process should end.