@Override public VirtualFile[] occursInPackagePrefixes(PsiPackage psiPackage) { List<VirtualFile> result = new ArrayList<VirtualFile>(); final Module[] modules = ModuleManager.getInstance(psiPackage.getProject()).getModules(); for (final Module module : modules) { for (final ContentEntry contentEntry : ModuleRootManager.getInstance(module).getContentEntries()) { final List<SourceFolder> sourceFolders = contentEntry.getSourceFolders(JavaModuleSourceRootTypes.SOURCES); for (final SourceFolder sourceFolder : sourceFolders) { final String packagePrefix = sourceFolder.getPackagePrefix(); if (packagePrefix.startsWith(psiPackage.getQualifiedName())) { final VirtualFile file = sourceFolder.getFile(); if (file != null) { result.add(file); } } } } } return VfsUtil.toVirtualFileArray(result); }