code: public TableFormatter content(Collection<?> collection) {
        this.content.add(new ArrayList<>(collection));
        longestCell = (int) Math.max(longestCell, collection.stream()
                                                            .mapToDouble(o -> {
                                                                            if (o instanceof Number) {
                                                                               return Math.max(MIN_CELL_WIDTH, length(Cast.as(o)));
                                                                            } else {
                                                                               return Math.max(MIN_CELL_WIDTH,
                                                                                               o.toString().length() + 2);
                                                                            }
                                                                         }
                                                                        ).max().orElse(0)
                                    );
        longestRow = Math.max(longestRow, collection.size());
        return this;
     }
docs: Content table formatter.
  
  @param collection the collection
  @return the table formatter