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    /// Represents a Unicode Version.
    ///
    /// See also: <http://www.unicode.org/versions/>
    #[derive(Clone, Copy, Debug, Eq, Ord, PartialEq, PartialOrd)]
    #[unstable(feature = "unicode_version", issue = "49726")]
    pub struct UnicodeVersion {
        /// Major version.
        pub major: u32,

        /// Minor version.
        pub minor: u32,

        /// Micro (or Update) version.
        pub micro: u32,

        // Private field to keep struct expandable.
        pub(crate) _priv: (),
    }

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