Thanx @rhyolight Matt for your links. It is very useful information. But I want to clarify some moments. I look at pseudocode Running a network on Network API Guide.
for iteration in (1, …, n):
for phase in (minPhase, …, maxPhase):
for each region associated with this phase:
invoke all network callbacks
What value can I set on phase, minPhase, maxPhase?
Can I compute only necessary region?