This component is a tech demo. As such it may not be as stable as a production quality release.
The component demonstrates a title formatting technique which allows using arbitrary functions on the individual values of multi-value fields. For example, the expression

$left(%<artist>%,1)|%<artist>%

should work like most users expect. Moreover, it will produce the same result as

$left($put(A,%<artist>%),1)|$get(A)