- refactored Firewall design to properly separate service from filter and move FirewallFilter in private packages
 - refactored Introspector class to hide private classes from public API
 - removed warnings in APISpark extension
 - refactored Firewall design to properly separate service from filter and move FirewallFilter in private packages
 - refactored Introspector class to hide private classes from public API
 - removed warnings in APISpark extension