check JSpecify (https://jspecify.dev https://jspecify.dev) - it's the standardised null annotation package for Java. Intellij understands the annotations so you

check JSpecify (https://jspecify.dev https://jspecify.dev) - it's the standardised null annotation package for Java. Intellij understands the annotations so you generally get decent null-checking across your codebase. Even better, apply at the package level via `package-info.java` (unfortunately sub-packages need to be individually marked as well) @NullMarked package com.foo; import org.jspecify.annotations.NullMarked;