public void setMetricDefinitionId(String metricDefinitionId) {
        this.metricDefinitionId = metricDefinitionId;
    }
<p>
The ID of this metric definition.
</p>

@param metricDefinitionId
       The ID of this metric definition.
aws-java-sdk-cloudwatchrum/src/main/java/com/amazonaws/services/cloudwatchrum/model/MetricDefinition.java