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: plain_persistence.rb
    path of file: ./repos/aasm/lib/aasm/persistence
    
    the code of the file until where you have to start completion: module AASM
  module Persistence
    modu
    
      def aasm_read_state(name=:default)
        # all the following lines behave like @current_state ||= aasm(name).enter_initial_state
        current = aasm(name).instance_variable_defined?("@current_state_#{name}") &&
                  aasm(name).instance_variable_get("@current_state_#{name}")
        return current if current
        aasm(name).instance_variable_set("@current_state_#{name}", aasm(name).enter_initial_state)
      end