checkNonnegative(expectedKeys, "expectedKeys");
    return new MultimapBuilderWithKeys<@Nullable Object>() {
      @Override
      <K extends @Nullable Object, V extends @Nullable Object> Map<K, Collection<V>> createMap() {
        return Platform.newHashMapWithExpectedSize(expectedKeys);
      }
    };
  }

  /**
   * Uses a hash table to map keys to value collections.
   *

package gorm

import "time"

// Model a basic GoLang struct which includes the following fields: ID, CreatedAt, UpdatedAt, DeletedAt
// It may be embedded into your model or you may build your own model without it
//
//	type User struct {
//	  gorm.Model
//	}
type Model struct {
	ID        uint `gorm:"primarykey"`
	CreatedAt time.Time
	UpdatedAt time.Time
	DeletedAt DeletedAt `gorm:"index"`

    //                                                                         ===========
    protected final ColumnInfo _columnCreatedAt = cci("createdAt", "createdAt", null, null, LocalDateTime.class, "createdAt", null, false,
            false, false, "LocalDateTime", 0, 0, null, null, false, null, null, null, null, null, false);

    //                                                                         ===========
    protected final ColumnInfo _columnCreatedAt = cci("createdAt", "createdAt", null, null, LocalDateTime.class, "createdAt", null, false,
            false, false, "LocalDateTime", 0, 0, null, null, false, null, null, null, null, null, false);

			z.ForceCreate, bts, err = msgp.ReadBoolBytes(bts)
			if err != nil {
				err = msgp.WrapError(err, "ForceCreate")
				return
			}
		case "CreatedAt":
			z.CreatedAt, bts, err = msgp.ReadTimeBytes(bts)
			if err != nil {
				err = msgp.WrapError(err, "CreatedAt")
				return
			}
		case "NoLock":
			z.NoLock, bts, err = msgp.ReadBoolBytes(bts)
			if err != nil {
				err = msgp.WrapError(err, "NoLock")

	}

	createdAt := time.Date(2020, 1, 1, 0, 0, 0, 0, time.UTC)
	updatedAt := createdAt.Unix()

	data := SerializerStruct{
		Name:            []byte("jinzhu"),
		Roles:           []string{"r1", "r2"},
		Contracts:       map[string]interface{}{"name": "jinzhu", "age": 10},
		EncryptedString: EncryptedString("pass"),
		CreatedTime:     createdAt.Unix(),
		UpdatedTime:     &updatedAt,

        "type": "keyword"
      },
      "url": {
        "type": "keyword"
      },
      "docId": {
        "type": "keyword"
      },
      "queryId": {
        "type": "keyword"
      },
      "createdAt": {
        "type": "date",
        "format": "date_optional_time"
      }
    }

	Counter    uint64 `gorm:"primary_key:yes"`
	Name       string `gorm:"DEFAULT:'galeone'"`
	From       string // test reserved sql keyword as field name
	Age        *time.Time
	unexported string // unexported value
	CreatedAt  time.Time
	UpdatedAt  time.Time
}

func TestNonStdPrimaryKeyAndDefaultValues(t *testing.T) {
	DB.Migrator().DropTable(&Animal{})
	if err := DB.AutoMigrate(&Animal{}); err != nil {

func TestFieldValuerAndSetter(t *testing.T) {
	var (
		userSchema, _ = schema.Parse(&tests.User{}, &sync.Map{}, schema.NamingStrategy{})
		user          = tests.User{
			Model: gorm.Model{
				ID:        10,
				CreatedAt: time.Now(),
				UpdatedAt: time.Now(),
				DeletedAt: gorm.DeletedAt{Time: time.Now(), Valid: true},
			},
			Name:     "valuer_and_setter",
			Age:      18,
			Birthday: tests.Now(),
			Active:   true,
		}

        } else {
            super.addFieldToSource(sourceMap, field, value);
        }
    }

    @Override
    public String toString() {
        return "UserInfo [createdAt=" + createdAt + ", updatedAt=" + updatedAt + ", docMeta=" + docMeta + "]";
    }

    @Override
    public String getEventType() {
        return "user";
    }