anchor.diff:  
     TSQLStatementType = (stSelect, stInsert, stUpdate, stDelete);
   
  +  {$REGION 'Documentation'}
  +  ///	<summary>
  +  ///	  Base SQL statement type.
  +  ///	</summary>
  +  {$ENDREGION}
     TSQLStatement = class
     private
       FOwner: TAnsiSQLBuilder;
  
positive.code:     function ToString(): string; override;
    end;
  
    TUpdateStatement = class(TSQLStatement)
    protected
      procedure AppendColumns(ABuilder: TStringBuilder); override;
  
negative.code:   ///	  .Table('dbo.Customers')
    ///	  .Column('AGE').Values('18')
    ///	  .Column('NAME').Values('Null')
    ///	  .ToString();</code>
    ///	  Building <b>insert</b> statements:
    ///	  <code lang="Delphi">
    ///	LSQLString := TSQLBuilder.Insert
  