@Override
    @Nullable
    public ClassLoader getClassLoader() {
        return (this.classLoader != null ? this.classLoader : ClassUtils.getDefaultClassLoader());
    }
Return the ClassLoader to load class path resources with.
<p>Will get passed to ClassPathResource's constructor for all
ClassPathResource objects created by this resource loader.

see ClassPathResource
analyzer/src/main/java/nl/basjes/parse/useragent/utils/springframework/core/io/DefaultResourceLoader.java