{* ../../docs_src/pydantic_v1_in_v2/tutorial004_an_py310.py hl[4,18] *}

### Migrate in steps { #migrate-in-steps }

/// tip

First try with `bump-pydantic`, if your tests pass and that works, then you're done in one command. ✨

///

If `bump-pydantic` doesn't work for your use case, you can use the support for both Pydantic v1 and v2 models in the same app to do the migration to Pydantic v2 gradually.

 * completed in the correct order. The three main lifecycles in Maven are
 * {@link #DEFAULT default}, {@link #CLEAN clean}, and {@link #SITE site}, with the
 * {@code default} lifecycle being the most commonly used for project builds.
 *
 * @since 4.0.0
 */
@Experimental
@Immutable
public interface Lifecycle extends ExtensibleEnum {

    // =========================
    // Maven defined lifecycles

            }

            sb.append(LS);
            sb.append(LS);
            sb.append(indentation);
            sb.append("Then, install it using the command: ");
            sb.append(LS);
            sb.append(indentation);
            sb.append("    mvn install:install-file -DgroupId=");
            sb.append(groupId);
            sb.append(" -DartifactId=");

			}
			return u, errNoSuchUser
		}
		u.Credentials.Claims = jwtClaims.Map()
	}

	if u.Credentials.Description == "" {
		u.Credentials.Description = u.Credentials.Comment
	}

	return u, nil
}

func (iamOS *IAMObjectStore) loadUserConcurrent(ctx context.Context, userType IAMUserType, users ...string) ([]UserIdentity, error) {
	userIdentities := make([]UserIdentity, len(users))

// converted to int they correspond to the rune size that was read.
type readOp int8

// Don't use iota for these, as the values need to correspond with the
// names and comments, which is easier to see when being explicit.
const (
	opRead      readOp = -1 // Any other read operation.
	opInvalid   readOp = 0  // Non-read operation.
	opReadRune1 readOp = 1  // Read rune of size 1.

// if one of the args do not meet the required conditions.
// Special conditions required by MinIO server are as below
//   - delimiter if set should be equal to '/', otherwise the request is rejected.
//   - marker if set should have a common prefix with 'prefix' param, otherwise
//     the request is rejected.
func validateListObjectsArgs(prefix, marker, delimiter, encodingType string, maxKeys int) APIErrorCode {
	// Max keys cannot be negative.
	if maxKeys < 0 {

 itself. This way locations of intermediary artifacts of a build would be
 in a known location. This would also help with developer setup i.e. getting
 new developers up and running. They could run a maven command and have all
 their source trees set up in the same way as their colleagues.

 here's what I do currently in the netbeans part of the mavenide project to

		} else {
			tests.AssertObjEqual(t, parsedField, f, "Name", "DBName", "BindNames", "DataType", "PrimaryKey", "AutoIncrement", "Creatable", "Updatable", "Readable", "HasDefaultValue", "DefaultValue", "NotNull", "Unique", "Comment", "Size", "Precision", "TagSettings")

			if f.DBName != "" {
				if field, ok := s.FieldsByDBName[f.DBName]; !ok || parsedField != field {
					t.Errorf("schema %v failed to look up field with dbname %v", s, f.DBName)
				}

	EncodingType       string `xml:"EncodingType,omitempty"`
	MaxUploads         int
	IsTruncated        bool

	// List of pending uploads.
	Uploads []Upload `xml:"Upload"`

	// Delimed common prefixes.
	CommonPrefixes []CommonPrefix
}

// ListBucketsResponse - format for list buckets response
type ListBucketsResponse struct {

		ObjectSize: lfi.Size,
		VersionID:  versionID,
		DiskCount:  len(storageDisks),
	}

	if lfi.IsValid() {
		result.ParityBlocks = lfi.Erasure.ParityBlocks
	} else {
		// Default to most common configuration for erasure blocks.
		result.ParityBlocks = er.defaultParityCount
	}
	result.DataBlocks = len(storageDisks) - result.ParityBlocks

	for index, disk := range storageDisks {
		if disk == nil {