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: sequence.rb
    path of file: ./repos/archivesspace/backend/app/model
    
    the code of the file until where you have to start completion: class Sequence
  # DEPRECATED: this is dead code since 
    
  def self._handle_get(request, initialised_sequences)
    sequence = request[:sequence]
    DB.open(true) do |db|
      if !initialised_sequences[sequence]
        initialised_sequences[sequence] = true

        DB.attempt {
          db[:sequence].insert(:sequence_name => sequence.to_s, :value => 0)
          request[:result].complete(0)
          return
        }.and_if_constraint_fails {
          # Sequence is already defined, which is fine
        }
      end

      # If we make it to here, the sequence already exists and needs to be incremented
      1000.times do
        old_value = db[:sequence].filter(:sequence_name => sequence.to_s).get(:value)
        updated_count = db[:sequence].filter(:sequence_name => sequence.to_s, :value => old_value).
                          update(:value => old_value + 1)

        if updated_count == 0
          # Need to retry
          sleep(0.01)
        elsif updated_count == 1
          request[:result].complete(old_value + 1)
          return
        else
          Log.error("Unrecognised response from SQL update when generating next element in sequence '#{sequence}': #{updated_count}")
        end
      end