question: protected void assertDependentMetricsExist ( List < String > dependentMetrics ) { for ( String dependentMetric : dependentMetrics ) { if ( ! metrics . containsKey ( dependentMetric ) ) { String message = String . format ( "Dependent metric %s is not in the metric dictionary" , dependentMetric ) ; LOG . error ( message ) ; throw new IllegalArgumentException ( message ) ; } } }
target:  Checks that the dependent metrics are in the dictionary, and throws an exception if any are not.