# Annotation Glossary

### A

allow-none

  NULL is OK, both for passing and for returning.

### E

element-type

  Generics and defining elements of containers and arrays.

### R

rename-to

  Rename the original symbol's name to SYMBOL.

### S

scope async

  The callback is valid until first called.

skip

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

### T

transfer full

  Free data after the code is done.