public ListWorldsResult withWorldSummaries(WorldSummary... worldSummaries) {
        if (this.worldSummaries == null) {
            setWorldSummaries(new java.util.ArrayList<WorldSummary>(worldSummaries.length));
        }
        for (WorldSummary ele : worldSummaries) {
            this.worldSummaries.add(ele);
        }
        return this;
    }
<p>
Summary information for worlds.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setWorldSummaries(java.util.Collection)} or {@link #withWorldSummaries(java.util.Collection)} if you want
to override the existing values.
</p>

@param worldSummaries
       Summary information for worlds.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-robomaker/src/main/java/com/amazonaws/services/robomaker/model/ListWorldsResult.java