code: function createRow(
      opts: Options,
      columns: number,
      getCellContent?: (column: number) => Node[]
  ): Block {
      const cellNodes = Range(0, columns)
          .map(i =>
              createCell(opts, getCellContent ? getCellContent(i) : undefined)
          )
          .toList();
  
      return Block.create({
          type: opts.typeRow,
          nodes: cellNodes
      });
  }
docs: Create a new row block