code: public F createFilter(BellaDatiService service, String dataSetId, String attributeCode) {
  		return createFilter(new FilterAttribute(service, dataSetId, attributeCode));
  	}
docs: Creates a filter using just an attribute code. Can be used if the code is
  already known to avoid having to make an extra API call loading report
  attributes.
  
  @param service service instance to connect to the server (to allow
  retrieving the attribute's values)
  @param dataSetId ID of the data set the attribute is defined in
  @param attributeCode code of the attribute
  @return a filter for the given attribute with this operation