code: function forEachCells(
      opts: Options,
      // The table
      table: Block,
      fn: (cell: Block, row: number, column: number) => any
  ): void {
      return table.nodes.forEach((row, rowIndex) =>
          row.nodes.forEach((cell, columnIndex) =>
              fn(cell, rowIndex, columnIndex)
          )
      );
  }
docs: Run the given function against each cells of the table