code: private TransactionalType getTransactionalType(FQMethod method) {
          TransactionalType type = transactionalMethods.get(method);
          if (type == null) {
              return TransactionalType.NONE;
          }
  
          return type;
      }
docs: returns the type of transactional annotation is applied to this method
  
  @param method
  the method to check for transactional methods
  @return whether the method is Transactional non, read or write