Ignores its arguments and returns an unspecified value.
lispworks
do-nothing &rest ignore => unspecified
| ignore⇩ | 
All arguments are ignored. | 
| unspecified | 
An unspecified value. | 
The function do-nothing ignores its arguments ignore and returns an unspecified value. It is useful as a function argument.
LispWorks® User Guide and Reference Manual - 01 Dec 2021 19:30:41