`Request` supports generic, type-driven access to data. Its use is currently restricted to the standard library in cases where trait authors wish to allow trait implementors to share generic information across trait boundaries. The motivating and prototypical use case is `core::error::Error` which would otherwise require a method per concrete type (eg. `std::backtrace::Backtrace` instance that implementors want to expose to users).

The unary logical negation operator `!`.

Changes the permissions found on a file or a directory.

Removes a directory at this path, after removing all its contents. Use carefully!

`Error` is a trait representing the basic expectations for error values, i.e., values of type `E` in `Result<T, E>`.

Returns an iterator over the entries within a directory.

Copies the contents of one file to another. This function will also copy the permission bits of the original file to the destination file.

Renames a file or directory to a new name, replacing the original file if `to` already exists.

Removes a file from the filesystem.

Options and flags which can be used to configure how a file is opened.