@Override
  public void visitAssignmentExpression(@NotNull PsiAssignmentExpression expression) {
    expression.getLExpression().accept(this);
    myBuf.append(expression.getOperationSign().getText());
    final PsiExpression rExpression = expression.getRExpression();
    if (rExpression != null) {
      rExpression.accept(this);
    }
  }
@Override
  public void visitAssignmentExpression(@NotNull PsiAssignmentExpression expression)