@SuppressWarnings("unchecked") public static Map<String,ConfigurationKey<?>> registeredKeys(){
synchronized (registeredKeys) {
    if (copy == null)     copy=Collections.unmodifiableMap((Map<String,ConfigurationKey<?>>)registeredKeys.clone());
    return copy;
  }
}

@ SuppressWarnings ( "unchecked" ) public static Map < String , ConfigurationKey < ? > > registeredKeys ( ) { synchronized ( registeredKeys ) { if ( copy == null ) copy = Collections . unmodifiableMap ( ( Map < String , ConfigurationKey < ? > > ) registeredKeys . clone ( ) ) ; return copy ; } }
returns a copy of the currently registered keys .
