| '''Summary'''
|Returns the specified {{Code|value}} to the attribute with the specified {{Code|$name}} from the session with the specified {{Mono|$id}}.
|-
| '''Errors'''
|{{Error|set|#Errors}} The supplied value cannot be materialized.
|}
! width="110"|Code
|Description
|-
|{{Code|set}}
|The supplied value cannot be stored.
|-
|{{Code|not-found}}