All Classes and Interfaces

Class	Description
OptionalExtension	Works like Extension except the activation of the extension is contingent on the presence of specific requirePlugins and/or classes.
OptionalExtensionProcessor	Processes extensions marked with OptionalExtension and decides when they are activated.
OptionalPackage	Works in conjunction with OptionalExtension to allow you to turn the entire packages conditional.
VariantSet	Keeps track of active variants.