Openapi Get Upgrade History Response Structure

{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/amazon-opensearch/refs/heads/main/json-structure/openapi-get-upgrade-history-response-structure.json",
  "name": "GetUpgradeHistoryResponse",
  "description": " Container for response returned by <code> <a>GetUpgradeHistory</a> </code> operation. ",
  "type": "object",
  "properties": {
    "UpgradeHistories": {
      "allOf": [
        {
          "$ref": "#/components/schemas/UpgradeHistoryList"
        },
        {
          "description": " A list of <code> <a>UpgradeHistory</a> </code> objects corresponding to each Upgrade or Upgrade Eligibility Check performed on a domain returned as part of <code> <a>GetUpgradeHistoryResponse</a> </code> object. "
        }
      ]
    },
    "NextToken": {
      "allOf": [
        {
          "$ref": "#/components/schemas/String"
        },
        {
          "description": "Pagination token that needs to be supplied to the next call to get the next page of results"
        }
      ]
    }
  }
}