boolean (PsiFileSystemItem fileSystemItem) { VirtualFile file = PsiUtilCore.getVirtualFile(fileSystemItem); if (file == null || !file.isValid()) return false; file = BackedVirtualFile.getOriginFileIfBacked(file); AreaInstance area = ProjectFileNode.findArea(file, myProject); if (area == null) return false; return getContainingFilter(file) != null; }