code: public static String getRawFile(final URI uri, final boolean strict) {
          return esc(strict).escapePath(getFile(getRawPath(uri, strict)));
      }
docs: Returns the raw (and normalized) file portion of the given URI.  The file is everything in the raw path after
  (but not including) the last slash.  This could also be an empty string, but will not be null.
  
  @param uri the URI to extract the file from
  @param strict whether or not to do strict escaping
  @return the extracted file