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: common_ptsd.rb
    path of file: ./repos/vets-api/lib/pdf_fill/forms
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require 'pdf_fill/forms/form_helper'

module PdfFill
  module Forms
    module CommonPtsd
      include FormHelper

      def expand_ssn(hash)
        ssn = hash['veteranSocialSecurityNumber']
        return hash if ssn.blank?

        ['', '1', '2'].each do |suffix|
          hash["veteranSocialSecurityNumber#{suffix}"] = split_ssn(ssn)
        end
        hash
      end

      def expand_veteran_dob(hash)
        veteran_date_of_birth = hash['veteranDateOfBirth']
        return if
    
      def format_incident(incident, index)
        return if incident.blank?

        incident_overflow = ["Incident Number: #{index}"]

        incident_date = incident['incidentDate'] || ''
        incident_overflow.push("Incident Date: #{incident_date}")

        incident_overflow.push("Dates of Unit Assignment: #{get_unit_date_overflow(incident['unitAssignedDates'])}")

        incident_location = incident['incidentLocation'] || ''
        incident_overflow.push("Incident Location: \n\n#{incident_location}")

        incident_unit_assigned = incident['unitAssigned'] || ''
        incident_overflow.push("Unit Assignment During Incident: \n\n#{incident_unit_assigned}")

        incident_description = incident['incidentDescription'] || ''
        incident_overflow.push("Description of Incident: \n\n#{incident_description}")

        incident_overflow
      end