# UpdateServiceIdentityRequest Updates explicitly present profile fields. Empty description clears it; omitted fields remain unchanged. Ownership is changed only through the transfer endpoint. Prefer `builder()` to the canonical record constructor. Builder-based call sites remain source-compatible when optional fields are added in later SDK versions. - `displayName` (`String`): Replacement display name. A present blank value is invalid. - `description` (`String`): Replacement description. An empty string clears the description. - `replaceLabels` (`java.util.Map`): Complete replacement label map; an empty map clears all labels and is mutually exclusive with mergeLabels. At most 20 entries; keys and values contain at most 255 characters; keys use [a-z0-9._-]. - `mergeLabels` (`java.util.Map`): Labels to upsert; must contain at least one entry and is mutually exclusive with replaceLabels. The final stored map may contain at most 20 entries; keys and values contain at most 255 characters; keys use [a-z0-9._-]. [Java](../../java.md)