You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: itinerary_search.rb
    path of file: ./repos/icare/app/services
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

class ItinerarySearch
  SEARCH_RADIUS_METERS = 5000
  GEO_WHERE_CONDITION = 'ST_DWithin(start_location, Geography(ST_MakePoint(:start_lon, :start_lat)), :sea
    
  def add_checkbox_filters(filters)
    %i[round_trip pink].each do |checkbox_field|
      param = params[:"filter_#{checkbox_field}"]
      filters[checkbox_field] = true if param == '1'
    end

    # Limit pink filter to female users
    filters[:pink] = false unless user.female?
  end