* Hooks (Before/After Create/Save/Update/Delete/Find)
* Eager loading with `Preload`, `Joins`
* Transactions, Nested Transactions, Save Point, RollbackTo to Saved Point
* Context, Prepared Statement Mode, DryRun Mode
* Batch Insert, FindInBatches, Find To Map
* SQL Builder, Upsert, Locking, Optimizer/Index/Comment Hints, NamedArg, Search/Update/Create with SQL Expr
* Composite Primary Key
* Auto Migrations
* Logger

  // +optional
  optional k8s.io.apimachinery.pkg.runtime.RawExtension oldObject = 10;

  // DryRun indicates that modifications will definitely not be persisted for this request.
  // Defaults to false.
  // +optional
  optional bool dryRun = 11;

  // Options is the operation option structure of the operation being performed.

  // +optional
  optional k8s.io.apimachinery.pkg.runtime.RawExtension oldObject = 10;

  // DryRun indicates that modifications will definitely not be persisted for this request.
  // Defaults to false.
  // +optional
  optional bool dryRun = 11;

  // Options is the operation option structure of the operation being performed.

message ApplyOptions {
  // When present, indicates that modifications should not be
  // persisted. An invalid or unrecognized dryRun directive will
  // result in an error response and no further processing of the
  // request. Valid values are:
  // - All: all dry run stages will be processed
  // +optional
  repeated string dryRun = 1;

  // Force is going to "force" Apply requests. It means user will

  // Webhooks with side effects MUST implement a reconciliation system, since a request may be
  // rejected by a future step in the admission chain and the side effects therefore need to be undone.
  // Requests with the dryRun attribute will be auto-rejected if they match a webhook with
  // sideEffects == Unknown or Some. Defaults to Unknown.
  // +optional
  optional string sideEffects = 6;

  // Webhooks with side effects MUST implement a reconciliation system, since a request may be
  // rejected by a future step in the admission chain and the side effects therefore need to be undone.
  // Requests with the dryRun attribute will be auto-rejected if they match a webhook with
  // sideEffects == Unknown or Some.
  optional string sideEffects = 6;

  // TimeoutSeconds specifies the timeout for this webhook. After the timeout passes,

- kube-apiserver: setting a `dryRun` query parameter on a CONNECT request will now cause the request to be rejected, consistent with behavior of other mutating API requests. Examples of CONNECT APIs are the `nodes/proxy`, `services/proxy`, `pods/proxy`, `pods/exec`, and `pods/attach` subresources. Note that this prevents sending a `dryRun` parameter to backends via `{nodes,services,pods}/proxy` subresources. ([#66083](https://githu...

- kube-conformance image will now run ginkgo with the `--dryRun` flag if the container is run with the environment variable E2E_DRYRUN set. ([#74731](https://github.com/kubernetes/kubernetes/pull/74731), [@johnSchnake](https://github.com/johnSchnake))

* Created a new `dryRun` query parameter for mutating endpoints. If the parameter is set, then the query will be rejected, as the feature is not implemented yet. This will allow forward compatibility with future clients; otherwise, future clients talking with older apiservers might end up modifying a resource even if they include the `dryRun` query parameter. ([#63557](https://github.com/kubernetes/kubernetes/pull/63557), [@ap...

- Fixed client cert setup in delegating authentication logic ([#69430](https://github.com/kubernetes/kubernetes/pull/69430), [@DirectXMan12](https://github.com/DirectXMan12))
- OpenAPI spec and API reference now reflect dryRun query parameter for POST/PUT/PATCH operations ([#69359](https://github.com/kubernetes/kubernetes/pull/69359), [@roycaihw](https://github.com/roycaihw))