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Refer to bug for some more detials : http://www.netbeans.org/issues/show_bug.cgi?id=82435 Since all the external reference has to be retrieved locally to the project and then used, user should be informed about this info in the Import customizer dialog. The dialog should also expose an option to invoke Retriever wizard.
*** Issue 82435 has been marked as a duplicate of this issue. ***
This needs to be designed.