Unable to find usages of method in MC source code IntelliJ IDEA

[TechPro424]

Description

Hi
I'm looking at the source of net.minecraft.world.item.CreativeModeTab;,
when I go to the buildContents method defined there and right click on the method and select "Find Usages" (I'm using IntelliJ IDEA), it does not return any results beyond my own references to the method in my mixins (I want to see it's usages in the MC src code, I stumbled upon one usage in CreativeModeTabs using Ctrl + F, even this usage is not shown by "Find Usages"
I even set the scope to "All Places" after running genSources, no errors were thrown, even my access widener worked

Please help me out and ping me when replying

[dicedpixels]

You need to generate and attach sources.

The Decompile with Vineflower option does both (usually). If you generated sources by run the Gradle task, you need to manually attached as described in the docs.