@Override
        public boolean equals(Object o) {
            if (o instanceof StringHeaderFactory) {
                StringHeaderFactory other = (StringHeaderFactory) o;
                return value.equals(other.value);
            }
            return false;
        }
Returns a new immutable {@link LazyHeaders} object.
core/src/main/java/com/bumptech/glide/load/model/LazyHeaders.java