urlDecode
Description: Converts a URL-friendly version of the Subject into a human-readable form.
Subject Type: String
Arguments: No arguments
Return Type: String
Examples: If we have a URL-Encoded attribute named
"url" with the value
"https://nifi.apache.org/some%20value%20with%20spaces", then the Expression
${url:urlDecode()}
will return "https://nifi.apache.org/some
value with spaces".