public EnvironmentPropertyDescriptions withPropertyGroupDescriptions(PropertyGroup... propertyGroupDescriptions) {
        if (this.propertyGroupDescriptions == null) {
            setPropertyGroupDescriptions(new java.util.ArrayList<PropertyGroup>(propertyGroupDescriptions.length));
        }
        for (PropertyGroup ele : propertyGroupDescriptions) {
            this.propertyGroupDescriptions.add(ele);
        }
        return this;
    }
<p>
Describes the execution property groups.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setPropertyGroupDescriptions(java.util.Collection)} or
{@link #withPropertyGroupDescriptions(java.util.Collection)} if you want to override the existing values.
</p>

@param propertyGroupDescriptions
       Describes the execution property groups.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-kinesisanalyticsv2/src/main/java/com/amazonaws/services/kinesisanalyticsv2/model/EnvironmentPropertyDescriptions.java