default boolean isOpen() {
        return false;
    }
Indicate whether this resource represents a handle with an open stream.
If {@code true}, the InputStream cannot be read multiple times,
and must be read and closed to avoid resource leaks.
<p>Will be {@code false} for typical resource descriptors.
analyzer/src/main/java/nl/basjes/parse/useragent/utils/springframework/core/io/Resource.java