7a6c8095696aa1ee94bab600dd2bebe86c11b5c8
Add ItemMutRef and FromMutVoid Used (in my project) to grab a `&mut CFMutableAttributedString` from an objc-c ivar to use methods introduced in #223. ```rust CFMutableAttributedString::from_mut_void(ptr) ``` <!-- Reviewable:start --> --- This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/core-foundation-rs/244) <!-- Reviewable:end -->
core-foundation-rs
Compatibility
Targets macOS 10.7 by default.
To enable features added in macOS 10.8, set Cargo feature mac_os_10_8_features. To have both 10.8 features and 10.7 compatibility, also set mac_os_10_7_support. Setting both requires weak linkage, which is a nighty-only feature as of Rust 1.19.
Description
Languages
Rust
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