[galaxy-dev] Import Datasets to History problem

Hi, Using Bioblend API to communicate with Galaxy Try to import datasets to history, using command: gi.histories.upload_dataset_from_library(historyID, datasetID) But I've got the error: bioblend.galaxy.client.ConnectionError: Unexpected response from galaxy: 400: "Please define the source ('library' or 'hda') and the content." What's the *source *and the content? How to get it and put as arguments into this function?