class Prawn::Table::Cells

def []=(row, col, cell) # :nodoc:
  cell.extend(Cell::InTable)
  cell.row = row
  cell.column = col
  if defined?(@indexed) && @indexed
    (@rows[row]    ||= []) << cell
    (@columns[col] ||= []) << cell
    @first_row    = row if !@first_row    || row < @first_row
    @first_column = col if !@first_column || col < @first_column
    @row_count    = @rows.size
    @column_count = @columns.size
  end
  self << cell
end