# Annotation Glossary

### A

allow-none

  NULL is OK, both for passing and for returning.

### C

closure

  This parameter is a 'user_data', for callbacks; many bindings can pass NULL here.

### R

rename-to

  Rename the original symbol's name to SYMBOL.

### S

scope notified

  The callback is valid until the GDestroyNotify argument is called.

skip

  Exposed in C code, not necessarily available in other languages.