code: public ThresholdLogSpanContext baggageItem(final String item, final String value) {
          baggageItems.put(item, value);
          return this;
      }
docs: Stores the given baggage item/value.
  
  If an item already exists, it will be overridden.
  
  @param item the item to store.
  @param value the value to store.
  @return this {@link ThresholdLogSpanContext} for chaining purposes.