Gradle: upgrade Tooling API from 2.1 up to 2.2 + generated source folders importing added
Handle smart pointers in lookup elements
com.intellij.index.IndexTest._testCollectedPsiWithDocumentChangedCommittedAndChangedAgain
mark getStyle as @NotNull and use OnePixelDivider.BACKGROUD as border color
update BACKGROUND color. remove alpha
+ @NotNull
api change. mark method as @NotNull