Function CFDataCreateMutableCopy 

pub unsafe extern "C-unwind" fn CFDataCreateMutableCopy(
    allocator: Option<&CFAllocator>,
    capacity: CFIndex,
    the_data: Option<&CFData>,
) -> Option<CFRetained<CFMutableData>>

👎Deprecated: renamed to CFMutableData::new_copy

Available on crate feature CFData only.