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: real_time.rb
    path of file: ./repos/thinking-sphinx/lib/thinking_sphinx/interfaces
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

class ThinkingSphinx::Interfaces::R
    
  def index
    return if indices.empty?
    if !command :running
      stream.puts <<-TXT
The Sphinx daemon is not currently running. Real-time indices can only be
populated by sending commands to a running daemon.
      TXT
      return
    end