contains
Description: Returns true if the
Subject contains the value of the argument anywhere in the value.
Subject Type: String
Arguments:
value : The value to search for
Return Type: Boolean
Examples: If the "filename" attribute has
the value "a brand new filename.txt", then the Expression
${filename:contains('new')} will return
true. ${filename:contains('NEW')} will
return false.
${filename:toUpper():contains('NEW')} returns
true.