def start_upload_session(body, close=false)
      resp = upload_request('/files/upload_session/start', body, close: close)
      UploadSessionCursor.new(resp['session_id'], body.length)
    end
def start_upload_session(body, close=false)
      resp = upload_request('/files/upload_session/start', body, close: close)
      UploadSessionCursor.new(resp['session_id'], body.length)
    end
Start an upload session to upload a file using multiple requests.

 @param [String, Enumerable] body
 @param [Boolean] close
 @return [Dropbox::UploadSessionCursor] cursor