public interface PipelineOptionsRegistrar
PipelineOptions creators have the ability to automatically have their
PipelineOptions registered with this SDK by creating a
ServiceLoader entry and a
concrete implementation of this interface.
It is optional but recommended to use one of the many build time tools such as
AutoService to generate the necessary META-INF files automatically.
java.lang.Iterable<java.lang.Class<? extends PipelineOptions>> getPipelineOptions()