Message Partition Channel
Different MPCs can exist, each defined as a Container.
An MPC allows the flow of messages from a Sending MSH to a Receiving MSH to be partitioned into several flows, each of which is controlled separately.
An MPC also allows flows from several Sending MSHs to be merged into a single unique flow that will be treated as such by a Receiving MSH.
Definition from https://ec.europa.eu/cefdigital/wiki/display/CEFDIGITAL/CEF+Glossary
