private static @Nullable PsiExpression getLhs(@NotNull PsiExpressionStatement statement) {
      PsiAssignmentExpression assignmentExpression = ObjectUtils.tryCast(statement.getExpression(), PsiAssignmentExpression.class);
      if (assignmentExpression == null) return null;
      return assignmentExpression.getLExpression();
    }
private static @Nullable PsiExpression getLhs(@NotNull PsiExpressionStatement statement)