private void addToDestinations(SummaryField summaryField, Schema schema) {
        if (summaryField.getDestinations().size() == 0) {
            addToDestination("default", summaryField, schema);
        }
        else {
            for (String destinationName : summaryField.getDestinations()) {
                addToDestination(destinationName, summaryField, schema);
            }
        }
    }
Makes implicitly defined summaries into explicit summaries

@author bratseth
config-model/src/main/java/com/yahoo/schema/processing/ImplicitSummaries.java