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: item_tax_applier.rb
    path of file: ./repos/workarea/core/app/models/workarea/pricing
    
    the code of the file until where you have to start completion: module Workarea
  module Pricing
    class ItemTaxApplier
      include TaxApplication

      def initialize(address, adjustments_to_tax)
        @address = address
        @adjustments_to_tax = adjustments_to_tax
        @adjustments_by_parent = adjustments_to_tax.grouped_by_parent
      end

      def apply
        @adjustments_to_tax.each { |adjustment| assign_item_tax(adjustment) }
      end

      private

      def assign_item_tax(
    
      def assign_item_tax(adjustment)
        order_item = adjustment._parent
        taxable_amount = @adjustments_by_parent[order_item].taxable_share_for(adjustment)
        return if taxable_amount.zero?

        rate = Tax.find_rate(adjustment.data['tax_code'], taxable_amount, @address)
        tax_amounts = calculate_tax_amounts(taxable_amount, rate)
        return if tax_amounts.values.sum.zero?

        order_item.adjust_pricing(
          price: 'tax',
          calculator: self.class.name,
          description: 'Item Tax',
          amount: tax_amounts.values.sum,
          data: tax_amounts.merge(
            'adjustment' => adjustment.id,
            'order_item_id' => adjustment._parent.id,
            'tax_code' => adjustment.data['tax_code']
          )
        )
      end