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: var.rb
    path of file: ./repos/steep/lib/steep/ast/types
    
    the code of the file until where you have to start completion: module Steep
  module AST
    module Types
      class Var
        attr_reader :name
        attr_reader :location

        def i
    
        def self.fresh_name(name)
          @mutex ||= Thread::Mutex.new

          @mutex.synchronize do
            @max ||= 0
            @max += 1

            :"#{name}(#{@max})"
          end
        end