Hello! I saw in the example that you can use redis in global or flow context. But I still don't understand how inside the function node I can set or get values? Can someone write a more detailed example of how I can set or read values inside the function using context?

Hello! I saw in the example that you can use redis in global or flow context. But I still don't understand how inside the function node I can set or get values? Can someone write a more detailed example of how I can set or read values inside the function using context?