[log] IDEA-132229 Store cached details by int to avoid extra int-to-Hash conversion.
[log] IDEA-132229 Get refs by id, not by hash
@Nullable
Capitalization annotation support
[vcs-log] minor: cleanup code
extract method: new signature detector preview added
extract method: new signature detector: add unused parameters to method calls as refs to initial vars
extract method: unused import cleanup
extract method: name suggestion to provide multiple initial name suggestions
extract method: suggest Object as return value if extract from incomplete expression (IDEA-69722)
a bit of javadoc
ensure uniqueness of package names in the list returned from PsiPackage.getSubPackages()