question: public void compileAllProjects ( List < File > pProjectRoots , IssueAcceptor issueAcceptor ) throws N4JSCompileException { List < File > absProjectRoots = HeadlessHelper . toAbsoluteFileList ( pProjectRoots ) ; ArrayList < File > pDir = HeadlessHelper . collectAllProjectPaths ( absProjectRoots ) ; compileProjects ( pProjectRoots , pDir , Collections . emptyList ( ) , issueAcceptor ) ; }
target:  Starting from the ProjectRoot all Available sub directories denoting a N4js-Project should be compiled together.