### CLI

* Use structured generator for kubectl autoscale.  ([#55913](https://github.com/kubernetes/kubernetes/pull/55913), [@wackxu](https://github.com/wackxu))

- The cloudstack and ovirt controllers have been deprecated and will be removed in a future version. ([#68199](https://github.com/kubernetes/kubernetes/pull/68199), [@dims](https://github.com/dims))

- K8s.io/apimachinery - scheme.Convert() now uses only explicitly registered conversions - default reflection based conversion is no longer available. `+k8s:conversion-gen` tags can be used with the `k8s.io/code-generator` component to generate conversions. ([#90018](https://github.com/kubernetes/kubernetes/pull/90018), [@wojtek-t](https://github.com/wojtek-t)) [SIG API Machinery, Apps and Testing]

- Fixed a deep copy issue when retrieving the controller reference. ([#124116](https://github.com/kubernetes/kubernetes/pull/124116), [@HiranmoyChowdhury](https://github.com/HiranmoyChowdhury)) [SIG API Machinery and Release]
- Fixed code-generator client-gen to work with `api/v1`-like package structure. ([#125162](https://github.com/kubernetes/kubernetes/pull/125162), [@sttts](https://github.com/sttts)) [SIG API Machinery and Apps]

- Remove support for `node-expansion` between `node-stage` and `node-publish` ([#108614](https://github.com/kubernetes/kubernetes/pull/108614), [@gnufied](https://github.com/gnufied))
- Removed deprecated `generator` and `container-port` flags ([#106824](https://github.com/kubernetes/kubernetes/pull/106824), [@lauchokyip](https://github.com/lauchokyip))

OpenAPI specs for native types have long been served at /openapi/v2, and they are consumed by a number of components, notably kubectl client-side validation, kubectl explain and OpenAPI based client generators.

With Kubernetes 1.15 as beta, OpenAPI schemas are also published for CRDs, as long as their schemas are structural.

These changes are reflected in the following Kubernetes enhancements:

    * The `generate-internal-groups.sh` script in k8s.io/code-generator will generate OpenAPI definitions by default in `pkg/generated/openapi`. Additional API group dependencies can be added via `OPENAPI_EXTRA_PACKAGES=<group>/<version> <group2>/<version2>...`.

overflow: hidden;\n  text-overflow: ellipsis;\n  white-space: nowrap;\n}\n",".vr {\n  display: inline-block;\n  align-self: stretch;\n  width: 1px;\n  min-height: 1em;\n  background-color: currentcolor;\n  opacity: $hr-opacity;\n}\n","// Utility generator\n// Used to generate utilities & print utilities\n@mixin generate-utility($utility, $infix: \"\", $is-rfs-media-query: false) {\n  $values: map-get($utility, values);\n\n  // If the values are a list or string, convert it into a map\n  @if type-of($values)...