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// `MetricDimension` is a subproperty of the `CloudWatchAlarmDefinition` property type.
//
// `MetricDimension` specifies a CloudWatch dimension, which is specified with a `Key` `Value` pair. The key is known as a `Name` in CloudWatch. By default, Amazon EMR uses one dimension whose `Key` is `JobFlowID` and `Value` is a variable representing the cluster ID, which is `${emr.clusterId}` . This enables the automatic scaling rule for EMR to bootstrap when the cluster ID becomes available during cluster creation.
//
// Example:
// // The code below shows an example of how to instantiate this type.
// // The values are placeholders you should change.