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: generic_type_registry.rb
    path of file: ./repos/tapioca/lib/tapioca/runtime
    
    the code of the file until where you have to start completion: # typed: strict
# frozen_string_literal: true

module Tapioca
  module Runtime
    # This class is responsible for storing and looking up information related to generic types.
    #
    # The class stores 2 different kinds of data, in two separate lookup tables:
    #   1. a lookup of generic type instances by name: `@generic_instances`
    #   2. a lookup of type variable serializer by constant and type variable
    #      instance: `@type_variables`
    #
    # By storing the above data, we can cheaply query each constant against this registry
    # to see if it declares any generic type variables. This becomes a simple lookup in the
    # `@type_variables` hash table with the given constant.
    #
    # If there is no entry, then we can cheaply know that we can skip generic type
    # information generation for this type.
    #
    # On the other hand, if we get a result, then the result will be a hash of type
    # variable to type variable serializers. This allows us to associate type variables
    # to the constant names that represent them, easily.
    module GenericTypeRegistry
      @generic_instances = T.let(
        {},
        T::Hash[String, Module],
      )

      @type_variables = T.let(
        {}.compare_by_identity,
        T::Hash[Module, T::Array[TypeVariableModule]],
      )

      class GenericType < T::Types::Simple
        extend T::Sig

        sig { params(raw_type: Module, underlying_type: Module).void }
        def initialize(raw_type, underlying_type)
          super(raw_type)

          @underlying_type = T.let(underlying_type, Module)
        end

        sig { params(obj: T.untyped).returns(T::Boolean) }
        def valid?(obj)
          obj.is_a?(@underlying_type)
        end
      end

      class << self
        extend T::Sig

        # This method is responsible for building the name of the instantiated concrete type
   
    
        def register_type(constant, types)
          # Build the name of the instantiated generic type,
          # something like `"Foo[X, Y, Z]"`
          type_list = types.map { |type| T::Utils.coerce(type).name }.join(", ")
          name = "#{Reflection.name_of(constant)}[#{type_list}]"

          # Create a generic type with an overridden `name`
          # method that returns the name we constructed above.
          #
          # Also, we try to memoize the generic type based on the name, so that
          # we don't have to keep recreating them all the time.
          @generic_instances[name] ||= create_generic_type(constant, name)
        end

        sig { params(instance: Object).returns(T::Boolean) }
        def generic_type_instance?(instance)
          @generic_instances.values.any? { |generic_type| generic_type === instance }
        end

        sig { params(constant: Module).returns(T.nilable(T::Array[TypeVariableModule])) }
        def lookup_type_variables(constant)
          @type_variables[constant]
        end

        # This method is called from intercepted calls to `type_member` and `type_template`.
        # We get passed all the arguments to those methods, as well as the `T::Types::TypeVariable`
        # instance generated by the Sorbet defined `type_member`/`type_template` call on `T::Generic`.
        #
        # This method creates a `String` with that data and stores it in the
        # `@type_variables` lookup table, keyed by the `constant` and `type_variable`.
        #
        # Finally, the original `type_variable` is returned from this method, so that the caller
        # can return it from the original methods as well.
        sig do
          params(
            constant: T.untyped,
            type_variable: TypeVariableModule,
          ).void
        end
        def register_type_variable(constant, type_variable)
          type_variables = lookup_or_initialize_type_variables(constant)

          type_variables << type_variable
        end

        private

        sig { params(constant: Module, name: String).returns(Module) }
        def create_generic_type(constant, name)
          generic_type = case constant
          when Class
            # For classes, we want to create a subclass, so that an instance of
            # the generic class `Foo[Bar]` is still a `Foo`. That is:
            # `Foo[Bar].new.is_a?(Foo)` should be true, which isn't the case
            # if we just clone the class. But subclassing works just fine.
            create_safe_subclass(constant)
          else
            # This can only be a module and it is fine to just clone modules
            # since they can't have instances and will not have `is_a?` relationships.
            # Moreover, we never `include`/`extend` any generic modules into the
            # ancestor tree, so this doesn't become a problem with checking the
            # instance of a class being `is_a?` of a module type.
            constant.clone
          end

          # Let's set the `name` and `to_s` methods to return the proper generic name
          name_proc = -> { name }
          generic_type.define_singleton_method(:name, name_proc)
          generic_type.define_singleton_method(:to_s, name_proc)

          override_type = GenericType.new(generic_type, constant)
          override_type_proc = -> { override_type }
          generic_type.define_singleton_method(:__tapioca_override_type, override_type_proc)

          # We need to define a `<=` method on the cloned constant, so that Sorbet
          # can do covariance/contravariance checks on the type variables.
          #
          # Normally, we would be doing proper covariance/contravariance checks here, but
          # that is not necessary, since we are not implementing a runtime type checker
          # here. It is just enough for the checks to pass, so that we can serialize the
          # signatures, assuming the sigs were well-formed.
          #
          # So we act like all subtype checks pass.
          generic_type.define_singleton_method(:<=) { |_| true }

          # Return the generic type we created
          generic_type
        end

        sig { params(constant: T::Class[T.anything]).returns(T::Class[T.anything]) }
        def create_safe_subclass(constant)
          # Lookup the "inherited" class method
          inherited_method = constant.method(:inherited)
          # and the module that defines it
          owner = inherited_method.owner

          # If no one has overriden the inherited method yet, just subclass
          return Class.new(constant) if Class == owner

          begin
            # Otherwise, some inherited method could be preventing us
            # from creating subclasses, so let's override it and rescue
            owner.send(:define_method, :inherited) do |s|
              inherited_method.call(s)
            rescue
              # Ignoring errors
            end

            # return a subclass
            Class.new(constant)
          ensure
            # Reinstate the original inherited method back.
            owner.send(:define_method, :inherited, inherited_method)
          end
        end

        sig { params(constant: Module).returns(T::Array[TypeVariableModule]) }
        def lookup_or_initialize_type_variables(constant)
          @type_variables[constant] ||= []
        end
      end
    end