XSLT_STATIC_URI_RESOLVER_CLASS config

Hi,

I want to set this property on the Processor:
https://www.saxonica.com/html/documentation10/javadoc/net/sf/saxon/lib/Feature.html#XSLT_STATIC_URI_RESOLVER_CLASS

However I don't get why it expects a string and not simply an instance
of URIResolver?

And if the string should contain a class name from which Saxon will
obtain the instance of URIResolver, how do I make sure to register
that instance?
From what I've seen in the code, there is DynamicLoader involved. Is
there an example somewhere?

BTW, my class does not have a default constructor.

Martynas