| io | 
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          | mod.rs | 
           Polyfill of parts of the standard library for `no_std` builds.
 All code in this subtree is derived from the standard library and licensed
 MIT or Apache 2.0 at your option.
 This implementation is used when `std` is not available and polyfills the
 necessary items from `std`. When the `std` feature is specified (so the
 standard library is available), the file `src/polyfill/std` is used
 instead, which just imports the respective items from `std`. | 
          624 | 
        
        
          | net | 
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          | os | 
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           |