def METHOD_NAME(project):
    if (not(hasattr(project, "project_properties"))):
        project.project_properties = {}
    if(not hasattr(project, "update_media_lengths_on_load")):
        project.update_media_lengths_on_load = True # old projects < 1.10 had wrong media length data which just was never used.
                                                    # 1.10 needed that data for the first time and required recreating it correctly for older projects
    if(not hasattr(project, "vault_folder")):
        project.vault_folder = None
        project.project_data_id = None