GoLand Plugins Develop using cache

I want to know how to use CachedValue module when developing jetbrains plugins especially in GoLand Plugins？I search in docs only find https://upsource.jetbrains.com/idea-ce/file/idea-ce-4682003011bb42ffdb872d081e79d300bb393d17/platform/core-api/src/com/intellij/psi/util/CachedValue.java but I still don't know how to use. Can someone offers a demo using CachedValue?