The caching configuration for a resolver that has caching activated.
The caching keys for a resolver that has caching activated. Valid values are entries from the `$context.arguments`, `$context.source`, and `$context.identity` maps.
`$context.arguments`
`$context.source`
`$context.identity`
The TTL in seconds for a resolver that has caching activated. Valid values are 1–3,600 seconds.