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" or "https%3A%2F%2Fnifi.apache.org%2Fsome+value+with+spaces", then the Expression ${url:urlDecode()}
will return "https://nifi.apache.org/some value with spaces".