Deeply nested CRD

crd.yaml

apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
  annotations:
    controller-gen.kubebuilder.io/version: v0.2.9
  creationTimestamp: null
  name: foos.myso.cybozu.com
spec:
  group: myso.cybozu.com
  names:
    kind: Foo
    listKind: FooList
    plural: foos
    singular: foo
  scope: Namespaced
  versions:
  - name: v1alpha1
    schema:
      openAPIV3Schema:
        description: Foo is the Schema for the Foo API
        properties:
          apiVersion:
            description: 'APIVersion defines the versioned schema of this representation
              of an object. Servers should convert recognized schemas to the latest
              internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources'
            type: string
          kind:
            description: 'Kind is a string value representing the REST resource this
              object represents. Servers may infer this from the endpoint the client
              submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds'
            type: string
          metadata:
            type: object
          spec:
            description: FooSpec defines the desired state of Foo.
            properties:
              t9:
                items:
                  properties:
                    t5:
                      items:
                        properties:
                          t4:
                            items:
                              properties:
                                t3:
                                  items:
                                    properties:
                                      t2:
                                        items:
                                          properties:
                                            t1:
                                              items:
                                                properties:
                                                  field:
                                                    type: string
                                                type: object
                                              type: array
                                          type: object
                                        type: array
                                    type: object
                                  type: array
                              type: object
                            type: array
                        type: object
                      type: array
                  type: object
                type: array
            type: object
        type: object
    served: true
    storage: true
status:
  acceptedNames:
    kind: ""
    plural: ""
  conditions: []
  storedVersions: []