code: public function setRows(array $rows)
      {
          foreach ($rows as $row) {
              $columnNumber = 0;
              if (!is_array($row)) {
                  $row = [$row];
              }
              foreach ($row as $column => $value) {
                  $this->updateWidth($columnNumber, $this->length($column));
                  $this->updateWidth($columnNumber, $this->length($value));
                  if (!in_array($column, $this->columns)) {
                      $this->columns[] = $column;
                  }
                  $columnNumber++;
              }
              $this->rows[] = $row;
          }
      }
docs: Set rows.
  
  @param array $rows