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: haml_buffer.rb
    path of file: ./repos/hamlit/lib/hamlit/parser
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Hamlit
  # This class is used onl
    
    def initialize(upper = nil, options = {})
      @active     = true
      @upper      = upper
      @options    = HamlOptions.buffer_defaults
      @options    = @options.merge(options) unless options.empty?
      @buffer     = new_encoded_string
      @tabulation = 0

      # The number of tabs that Engine thinks we should have
      # @real_tabs + @tabulation is the number of tabs actually output
      @real_tabs = 0
    end