A StrongSynchronizationConstraint describes how tightly the occurrences of a group of events follow each other.<br/><br/>Semantics:<br/>A system behavior satisfies a StrongSynchronizationConstraint c if and only if<br/>there is a set of times X such that for each c.event index i, the same system behavior satisfies<br/><br/>StrongDelayConstraint { source = X,<br/>target = c.event(i),<br/>lower = 0,<br/>upper = c.tolerance }<br/>