public void registerSinkHandler(String elementId, SinkHandler sinkHandler) {
        this.registeredSinkHandlers.put(elementId, sinkHandler);
    }
Saves a list of registered {@link SinkHandler} classes against the respective {@link Sink} elementId.
modules/siddhi-core/src/main/java/io/siddhi/core/stream/output/sink/SinkHandlerManager.java