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: options.rb
    path of file: ./repos/stackneveroverflow/vendor/bundle/ruby/2.3.0/gems/haml-5.0.1/lib/haml
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
module Haml
  # This class encapsulates all of the configuration options that Haml
 
    
    def for_buffer
      self.class.buffer_option_keys.inject({}) do |hash, key|
        value = public_send(key)
        if self.class.buffer_defaults[key] != value
          hash[key] = value
        end
        hash
      end