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: root_node.rb
    path of file: ./repos/wongi-engine/lib/wongi-engine/beta
    
    the code of the file until where you have to start completion: module Wongi::Engine
  class RootNode < BetaNode
    def seed(assignments = {})
      @seed = assignments
      t = Token.new(self, nil, nil, assignments)
      rete
    
    def beta_activate(token)
      # existing = tokens.find { |et| et.duplicate? token }
      # return if existing # TODO: really?

      overlay.add_token(token)

      children.each do |child|
        child.beta_activate(Token.new(child, token, nil))
      end

      nil
    end