kotlin-fork/annotations/com/intellij/openapi/project/annotations.xml

<root>
    <item
        name='com.intellij.openapi.project.DumbService com.intellij.openapi.project.DumbService getInstance(com.intellij.openapi.project.Project)'>
        <annotation name='org.jetbrains.annotations.NotNull'/>
    </item>
</root>