Purpose of this class is to provide DataProcessors which have been instanciated in parallel via the o2::framework::parallel function with information relevant to the parallel execution, e.g. how many workers have been created by the above mentioned function and what's the unique id the caller is associated with. This context is exposed as a Service and it's therefore available to both the init and the processing callbacks via:
auto ctx = services.get<ParallelContext>();
FIXME: should we have convenience methods to address workers using different parallel topology (e.g. have a index2D, rather than index1D).
Definition at line 32 of file ParallelContext.h.