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: def.rb
    path of file: ./repos/unparser/lib/unparser/emitter
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

modul
    
        def subject_without_parens?
          case subject.type
          when :self
            true
          when :const
            !subject.children.first
          when :send
            receiver, _selector, *arguments = *subject
            !receiver && arguments.empty?
          end