public void dumpBiProps(final String prefix, final BufferedImage src) {
        final String[] keys = src.getPropertyNames();
        if (keys == null) {
            LOGGER.fine(prefix + ": no props");
            return;
        }
        for (final String key : keys) {
            LOGGER.fine(prefix + ": " + key + ": " + src.getProperty(key));
        }
    }
Used to store metadata and descriptive information extracted from image files.
src/main/java/org/apache/commons/imaging/ImageDump.java