Implementations to be found in project lookup.
Will be used by the debugger when preparing binaries/sources for the debugging
engine. By default the project's dependencies are included. For "pom" packaged
projects also all modules are iterated and their classpath is added.
This interface servers for project to provide additional list of projects that will be
iterated and their respective classpath added to debugger.
The primary usecase is ear debugging where wars/ejbjars needs to be added as well.