成员的完整列表，这些成员属于 fsdk.SplitPDFDocCallback,包括所有继承而来的类成员

NeedToPause()	fsdk.SplitPDFDocCallback
ProgressNotify(before_splitting_file_name, after_split_file_path, split_page_count, total_page_count)	fsdk.SplitPDFDocCallback
ResultNotify(result_array)	fsdk.SplitPDFDocCallback