static @Nullable DuplicateExpressionsContext getContext(@Nullable PsiCodeBlock body, @NotNull UserDataHolder session) {
    Map<PsiCodeBlock, DuplicateExpressionsContext> contexts = session.getUserData(CONTEXTS_KEY);
    return contexts != null ? contexts.get(body) : null;
  }
static @Nullable DuplicateExpressionsContext getContext(@Nullable PsiCodeBlock body, @NotNull UserDataHolder session)