message: Allow release_policy to be nullable
diff: },
  "release_policy": {
  "$ref": "#/definitions/KeyReleasePolicy",
  + "x-nullable": true,
  "description": "The policy rules under which the key can be exported."
  }
  },
  },
  "release_policy": {
  "$ref": "#/definitions/KeyReleasePolicy",
  + "x-nullable": true,
  "description": "The policy rules under which the key can be exported."
  }
  },
  },
  "release_policy": {
  "$ref": "#/definitions/KeyReleasePolicy",
  + "x-nullable": true,
  "description": "The policy rules under which the key can be exported."
  }
  },
  },
  "release_policy": {
  "$ref": "#/definitions/KeyReleasePolicy",
  + "x-nullable": true,
  "description": "The policy rules under which the key can be exported."
  }
  },
  