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

        this.regions = new java.util.ArrayList<String>(regions);
    }
<p>
A list of Amazon Web Services Regions.
</p>

@param regions
       A list of Amazon Web Services Regions.
aws-java-sdk-health/src/main/java/com/amazonaws/services/health/model/EventFilter.java