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: class_and_class_of.rb
    path of file: ./repos/sorbet/test/testdata/infer/generics
    
    the code of the file until where you have to start completion: # typed: true
class Module; include T::Sig; end

module MyInterface
  extend T::Help
    
  def some_instance_method; 0; end

  module ClassMethods
    sig {returns(String)}
    def some_class_method; ''; end
  end
  mixes_in_class_methods(ClassMethods)
end