{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "credit_card": {
      "type": "string"
    },
    "billing_address": {
      "type": "string"
    }
  },
  "dependentRequired": {
    "credit_card": [
      "billing_address"
    ]
  }
}