The static side of AddressSpace.
Naming it separately is what keeps the implementation out of the published API: the value exported below is the real class, but it is seen through this, so only create and historizerFactory are reachable.
create
historizerFactory
Optional
How historized variables get their historian. Assigning here replaces the default that the historical-access code installs on first use.
build an empty address space
The static side of AddressSpace.
Naming it separately is what keeps the implementation out of the published API: the value exported below is the real class, but it is seen through this, so only
createandhistorizerFactoryare reachable.