Function CFCharacterSetCreateMutableCopy 

pub unsafe extern "C-unwind" fn CFCharacterSetCreateMutableCopy(
    alloc: Option<&CFAllocator>,
    the_set: Option<&CFCharacterSet>,
) -> Option<CFRetained<CFMutableCharacterSet>>

👎Deprecated: renamed to CFMutableCharacterSet::new_copy

Available on crate feature CFCharacterSet only.