code: public DynamicReportBuilder setColspan(int colNumber, int colQuantity, String colspanTitle) {
          this.setColspan(colNumber, colQuantity, colspanTitle, null);
  
          return this;
  
      }
docs: Set a colspan in a group of columns. First add the cols to the report
  
  @param colNumber    the index of the col
  @param colQuantity  the number of cols how i will take
  @param colspanTitle colspan title
  @return a Dynamic Report Builder
  @throws ColumnBuilderException When the index of the cols is out of
  bounds.