Member predicate MetricPackage :: getAfferentCoupling
Afferent Coupling (incoming dependencies).
The afferent coupling of a package is the number of types outside this package that depend on types inside this package.
A high afferent coupling is an indication that the package has many responsibilities; it may thus be a good idea to consider whether these responsibilities can be separated into separate packages.
Afferent coupling of packages is also used to define other package metrics, such as the instability metric.