-As a user, I want to enter custom JEXL expression to manipulate my data.
I can do so, by selecting the
"Custom JEXL Transform" "Set Column" in the main drop down menu and open a submenu with an input box a link to JEXL Documentation.
I can type custom and complex JEXL directives and apply them to my column.
A link to JEXL documentation opens a new tab and takes the user to https://commons.apache.org/proper/commons-jexl/reference/syntax.html
Hint text: "Type Custom JEXL Directive"