public Collection<OperatorSpec<OM, ?>> getRegisteredOperatorSpecs() {
    return nextOperatorSpecs;
  }
Get the collection of chained {@link OperatorSpec}s that are consuming the output of this node

@return the collection of chained {@link OperatorSpec}s
samza-core/src/main/java/org/apache/samza/operators/spec/OperatorSpec.java