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: method_info.rb
    path of file: ./repos/brakeman/lib/brakeman/tracker
    
    the code of the file until where you have to start completion: require 'brakeman/util'

module Brakeman
  class Metho
    
    def first_body
      case @type
      when :class
        src[4]
      when :instance
        src[3]
      end