public Builder addColumn(final Collection<Column> values) {
            if (this.columns == null) {
                this.columns = new ArrayList<>(values);
            } else {
                this.columns.addAll(values);
            }
            return self();
        }
Convenience function for adding multiple fields that are already in a collection.

@param values The columns to add
@return this builder, with the columns added.
stroom-core-shared/src/main/java/stroom/dashboard/shared/TableComponentSettings.java