Adding feature required Tag to Rust Documentation

I had a lot of trouble understanding this. Thus I am documenting it here for myself. All credit goes to the original StackOverFlow author. Add one of the following to the root of your crate. Usually 1. #![feature(doc_cfg)]This is less than ideal as it will cause compile errors when used with stable 2. It is better to use: #![cfg_attr(docsrs, feature(doc_cfg))]This allows this to be conditionally compiled and does not give any errors. [Read More]