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: tsort.rb
    path of file: ./repos/artichoke/artichoke-backend/src/extn/stdlib/vendor/gen
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

#--
# tsort.rb - provides a module for topological sorting and strongly connected components.
#++
#

#
# TSort implements topological sorting using Tarjan's algorithm for
# strongly conn
    
  def TSort.tsort_each(each_node, each_child) # :yields: node
    return to_enum(__method__, each_node, each_child) unless block_given?

    TSort.each_strongly_connected_component(each_node, each_child) {|component|
      if component.size == 1
        yield component.first
      else
        raise Cyclic.new("topological sort failed: #{component.inspect}")
      end