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: generated.go
    path of file: ./repos/gqlgen/_examples/uuid/graph
    
    the code of the file until where you have to start completion: // Code generated by github.com/99designs/gqlgen, DO NOT EDIT.

package graph

import (
	"bytes"
	"context"
	"embed"
	"errors"
	"fmt"
	"strconv"
	"sync"
	"sync/atomic"

	"github.com/99designs/gqlgen/_examples/uuid/graph/model"
	"github.com/99designs/gqlgen/graphql"
	"github.com/99designs/gqlgen/graphql/introspection"
	"github.com/google/uuid"
	gqlparser "github.com/vek
    
func (ec *executionContext) ___Schema_types(ctx context.Context, field graphql.CollectedField, obj *introspection.Schema) (ret graphql.Marshaler) {
	fc, err := ec.fieldContext___Schema_types(ctx, field)
	if err != nil {
		return graphql.Null
	}
	ctx = graphql.WithFieldContext(ctx, fc)
	defer func() {
		if r := recover(); r != nil {
			ec.Error(ctx, ec.Recover(ctx, r))
			ret = graphql.Null
		}
	}()
	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
		ctx = rctx // use context from middleware stack in children
		return obj.Types(), nil
	})
	if err != nil {
		ec.Error(ctx, err)
		return graphql.Null
	}
	if resTmp == nil {
		if !graphql.HasFieldError(ctx, fc) {
			ec.Errorf(ctx, "must not be null")
		}
		return graphql.Null
	}
	res := resTmp.([]introspection.Type)
	fc.Result = res
	return ec.marshalN__Type2ᚕgithubᚗcomᚋ99designsᚋgqlgenᚋgraphqlᚋintrospectionᚐTypeᚄ(ctx, field.Selections, res)
}