code: public String toFtpCmdArgument() {
  	StringBuffer msg = new StringBuffer();
          msg.append("|");
          if (this.version != null) {
              msg.append(this.version);
          }
          msg.append("|");
          if (this.host != null) {
              msg.append(this.host);
          }
          msg.append("|");
          msg.append(String.valueOf(this.port));
          msg.append("|");
  	return msg.toString();
      }
docs: Returns the host-port information in the
  format used by EPRT command.
  &lt;d&gt;&lt;net-prt&gt;&lt;d&gt;&lt;net-addr&gt;&lt;d&gt;&lt;tcp-port&gt;&lt;d&gt;
  
  @return host-port information in EPRT command
  representation.