private static @Nullable PsiExpression getInitializer(@NotNull PsiAssignmentExpression assignmentExpr) {
    final IElementType operationSign = assignmentExpr.getOperationTokenType();
    PsiExpression result = assignmentExpr.getRExpression();
    if (JavaTokenType.EQ != operationSign && result != null) {
      result = DeclarationJoinLinesHandler.getInitializerExpression(assignmentExpr.getLExpression(), assignmentExpr);
    }
    return result;
  }
private static @Nullable PsiExpression getInitializer(@NotNull PsiAssignmentExpression assignmentExpr)