dump method

void dump()

Implementation

void dump() {
  for (int col = 0; col < columns; col++)
    stdout.write('${columnNames[col].toString().padLeft(15)}');
  stdout.writeln();
  for (int row = 0; row < rows; row++) {
    for (int col = 0; col < columns; col++)
      stdout.write('${getValueAsString(row, col).toString().padLeft(15)}');
    stdout.writeln();
  }
}