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: tree_finder.rb
    path of file: ./repos/gitlabhq/app/finders/repositories
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Repositories
  class TreeFinder
    CommitMissingError = Class.new(StandardError)

    attr_reader :next_cursor

    def initialize(project
    
    def total
      # This is inefficient and we'll look at replacing this implementation
      cache_key = [project, repository.commit, :tree_size, commit.id, path, recursive]
      Gitlab::Cache.fetch_once(cache_key) do
        repository.tree(commit.id, path, recursive: recursive).entries.size
      end
    end