I will give you a code snippet that uses multiple APIs from library L. You need to write a summarization for the code as task description(in string format enclosed in double quotes), and the subtasks that each one refers to an API in L in the following format:
{"task": task description, "subtasks": [subtask1, subtask2...] }

Code snippet: 
[CODE]
APIs:
[API]
Task and subtasks:
