Defined in github.com/aws/aws-sdk-go/service/iam/api.go
A list of context keys that are required by the included input policies but that were not provided by one of the input parameters. This list is used when a list of ARNs is included in the ResourceArns parameter instead of "*". If you do not specify individual resources, by setting ResourceArns to "*" or by not including the ResourceArns parameter, then any missing context values are instead included under the EvaluationResults section. To discover the context keys used by a set of policies, you can call GetContextKeysForCustomPolicy or GetContextKeysForPrincipalPolicy.