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: functions.rb
    path of file: ./repos/nanoc/nanoc/lib/nanoc/filters/sass
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module ::Sass::Script::Functions
  def nanoc(string, params = {}
    
  def nanoc(string, params = {})
    assert_type string, :String
    assert_type params, :Hash
    result = options[:importer].filter.instance_eval(string.value)
    case result
    when TrueClass, FalseClass
      bool(result)
    when Array
      list(result, :comma)
    when Hash
      map(result)
    when nil
      null
    when Numeric
      number(result)
    else
      params['unquote'] ? unquoted_string(result) : quoted_string(result)
    end