public void ImportRows(ITable sourceTable){
     var myCount = ColumnCount;
     var srcCount = sourceTable.ColumnCount;
     if (myCount < srcCount) ExtentWithColumns(srcCount - myCount);
     if (myCount > srcCount) sourceTable.ExtentWithColumns(myCount - srcCount);
     if (sourceTable.Title.hasContent())
         AppendTitle(sourceTable.Title);
     foreach (var row in sourceTable.Body.Rows)
         Body.Rows.Add((row));
 }