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: time_since_purchase.rb
    path of file: ./repos/spree/core/app/models/spree/return_item/eligibility_validator
    
    the code of the file until where you have to start completion: module Spree
  class ReturnItem::EligibilityValidator::TimeSincePurchase < Spree::ReturnItem::EligibilityValidator::BaseValidator
    def eligible_for_return?
      if (@re
    
    def eligible_for_return?
      if (@return_item.inventory_unit.order.completed_at + Spree::Config[:return_eligibility_number_of_days].days) > Time.current
        true
      else
        add_error(:number_of_days, Spree.t('return_item_time_period_ineligible'))
        false
      end