@Override
  public void visitPyPrefixExpression(@NotNull PyPrefixExpression node) {
    if (node.getOperator() == PyTokenTypes.NOT_KEYWORD) {
      myPositive = !myPositive;
      super.visitPyPrefixExpression(node);
      myPositive = !myPositive;
    }
    else {
      super.visitPyPrefixExpression(node);
    }
  }
@Override
  public void visitPyPrefixExpression(@NotNull PyPrefixExpression node)