public void setMetricDefinitionIds(java.util.Collection<String> metricDefinitionIds) {
        if (metricDefinitionIds == null) {
            this.metricDefinitionIds = null;
            return;
        }

        this.metricDefinitionIds = new java.util.ArrayList<String>(metricDefinitionIds);
    }
<p>
An array of structures which define the metrics that you want to stop sending.
</p>

@param metricDefinitionIds
       An array of structures which define the metrics that you want to stop sending.
aws-java-sdk-cloudwatchrum/src/main/java/com/amazonaws/services/cloudwatchrum/model/BatchDeleteRumMetricDefinitionsRequest.java