public static boolean isResourceReference(String str){
  return str.startsWith(BIG_QUOTE_LEFT) && str.endsWith(BIG_QUOTE_RIGHT) && str.charAt(1) == AT.charAt(0);
}

public static boolean isResourceReference ( String str ) { return str . startsWith ( BIG_QUOTE_LEFT ) && str . endsWith ( BIG_QUOTE_RIGHT ) && str . charAt ( 1 ) == AT . charAt ( 0 ) ; }
return the str is resource reference or not .
