prepend
Description: The prepend function
returns the result of prepending the argument to the value of the Subject. If the subject
is null, returns the argument itself.
Subject Type: String
Arguments:
value : The String to prepend to the beginning of the Subject
Return Type: String
Examples: If the "filename" attribute has
the value "filename.txt", then the Expression
${filename:prepend('a brand new ')} will return "a
brand new filename.txt".