The page "How to Write Buffer Plugin" does not have any content

[felipe-conde-devo]

Describe the bug

The page https://docs.fluentd.org/plugin-development/api-plugin-buffer does not have any relevant content.

Link to the problematic documentation

https://docs.fluentd.org/plugin-development/api-plugin-buffer

Expected explanation

I expected to see information about how to write a buffer plugin

Additional context

I'm interested in writing a new buffer plugin for the Redis service