public byte getByte(String key, Filter filter) { Byte value = getByte(key, filter, null); assertNotNull(key, value); return value.byteValue();
public byte getByte(String key) { return properties.getByte(key);
    public byte getByte(String key, Filter filter) {        Byte value = getByte(key, filter, null);                assertNotNull(key, value);        return value.byteValue();    }