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Implement sub-projects (solutions)
I think once Alexander has .so dependencies analysis implemented and dependency can be easily created as separate projects we really need solutions. There was also a request to make it easy (one click) to build a set of projects. Solutions can solve this as well. 6.10? BTW, it might be somewhat connected to #190069 as the way how solution was created should be an attribute of solution, not a project.
Here is the functional spec on this feature: http://wiki.netbeans.org/CNDProjectsGroupsSpec