Hi. I've promised my use case for file references. I have in fact two. First is rather simple, and, I believe already covered in the library. I want an external resource management, specifically data files. What is important is that I want to be able to evaluate file by parts without loading it to memory. For example, I need to read files preambles, store them and then access full files if necessary like it is done here: https://bitbucket.org/Altavir/dataforge/src/default/dataforge-core/src/main/kotlin/hep/dataforge/io/envelopes/DefaultEnvelopeReader.kt.