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: test_command_definition.rb
    path of file: ./repos/roma/test
    
    the code of the file until where you have to start completion: require 'test_helper'
require 'roma/command/command_definition'
require 'digest/sha1'
r
    
    def get_vnode_id(d) 1 end
    def search_nodes_for_write(vn) ['roma0','roma1'] end
  end

  class LogStub
    def warn str
    end
  end