private static boolean isFileNotContainedIn(String filename, Set<FileContent> javaFiles) {
        return !javaFiles.contains(new FileContent(filename, null, null, null));
    }
Determines if a given file is eligible for processing.

@param file The file name or path to check
@return true if the file is eligible, false otherwise
primefaces-showcase/src/main/java/org/primefaces/showcase/util/FileContentMarkerUtil.java