```ruby
module Healthy
  module A19
    class NameParser
      attr_reader :message

      def initialize(message)
        @message = message
      end

      def firstname
        return unless names[:nick]
        names[:nick].fetch('PID.5.2')
      end

      def initials
        "#{names[:legal].fetch('PID.5.2')} #{names[:legal].fetch('PID.5.3')}".strip
      end

      def lastname
        prefix   = clean(names[:legal].fetch('PID.5.1').fetch('PID.5.1.2'))
        lastname = clean(names[:legal].fetch('PID.5.1').fetch('PID.5.1.3'))
        "#{prefix} #{lastname}".strip
      end

      def display_name
        return unless names[:display]
        names[:display].fetch('PID.5.1')
      end

      private

      def source
        message.fetch('MSH').fetch('MSH.4').fetch('MSH.4.1')
      end

      def names
        names = {}
        message.fetch('PID').fetch('PID.5').each do |record|
          case record.fetch('PID.5.7')
          when 'L'
            names[:legal] = record
          when 'D'
            names[:display] = record
          when 'N'
            names[:nick] = record
          else
            # ignore record
          end
        end
        names
      end

      def clean(string)
        string.gsub(/^""$/, "")
      end
    end
  end
end```

Remove no longer needed source method
user
```ruby
module Healthy
  module A19
    class NameParser
      attr_reader :message

      def initialize(message)
        @message = message
      end

      def firstname
        return unless names[:nick]
        names[:nick].fetch('PID.5.2')
      end

      def initials
        "#{names[:legal].fetch('PID.5.2')} #{names[:legal].fetch('PID.5.3')}".strip
      end

      def lastname
        prefix   = clean(names[:legal].fetch('PID.5.1').fetch('PID.5.1.2'))
        lastname = clean(names[:legal].fetch('PID.5.1').fetch('PID.5.1.3'))
        "#{prefix} #{lastname}".strip
      end

      def display_name
        return unless names[:display]
        names[:display].fetch('PID.5.1')
      end

      private

      def names
        names = {}
        message.fetch('PID').fetch('PID.5').each do |record|
          case record.fetch('PID.5.7')
          when 'L'
            names[:legal] = record
          when 'D'
            names[:display] = record
          when 'N'
            names[:nick] = record
          else
            # ignore record
          end
        end
        names
      end

      def clean(string)
        string.gsub(/^""$/, "")
      end
    end
  end
end```
assistant