Make an item visible to others.
The keyword pub makes any module, function, or data structure accessible from inside of external modules. The pub keyword may also be used in a use declaration to re-export an identifier from a namespace.
For more information on the pub keyword, please see the visibility section of the reference and for some examples, see Rust by Example.
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Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/keyword.pub.html