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: classes.rb
    path of file: ./repos/artichoke/spec-runner/vendor/spec/core/kernel/fixtures
    
    the code of the file until where you have to start completion: module KernelSpecs
  def self.Array_function(arg)
    Array(arg)
  end

  def self.Array_method(arg)
    Kernel.Array(arg)
  end

  def self.Hash_function(arg)
    Hash
    
    def parent_method; end
    def another_parent_method; end
    def self.parent_class_method; :foo; end
  end

  class Child < Parent
    undef_method :parent_method
  end

  class Grandchild < Child
    undef_method :parent_mixin_method
  end