public PropertyGroup clearPropertyMapEntries() {
        this.propertyMap = null;
        return this;
    }
Removes all the entries added into PropertyMap.

@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/PropertyGroup.java