code: private ConcurrentHashMap<String, BaseMethodBinding<?>> getMapForOperation(RestOperationTypeEnum operationType) {
  		ConcurrentHashMap<String, BaseMethodBinding<?>> result = operationBindings.get(operationType);
  		if(result == null) {
  			operationBindings.putIfAbsent(operationType, new ConcurrentHashMap<String, BaseMethodBinding<?>>());
  			return getMapForOperation(operationType);
  		} else {
  			return result;
  		}
  	}
docs: Get the map for the given operation type. If no map exists for this operation type, create a new hashmap for this
  operation type and add it to the operation bindings.
  
  @param operationType the operation type.
  @return the map defined in the operation bindings