Function CFSocketCopyRegisteredValue 

pub unsafe extern "C-unwind" fn CFSocketCopyRegisteredValue(
    name_server_signature: *const CFSocketSignature,
    timeout: CFTimeInterval,
    name: Option<&CFString>,
    value: *mut *const CFPropertyList,
    name_server_address: *mut *const CFData,
) -> CFSocketError

👎Deprecated: renamed to CFSocket::copy_registered_value

Available on crate features CFData and CFDate and CFSocket only.