default boolean isDataLoaded(final RefStreamDefinition refStreamDefinition) {
        return getLoadState(refStreamDefinition)
                .filter(processingState ->
                        processingState.equals(ProcessingState.COMPLETE))
                .isPresent();
    }
Returns true if all the data for the passed stream definition has been successfully loaded into the
store and is available for use. Will also touch the last accessed time on the record (if found).
stroom-pipeline/src/main/java/stroom/pipeline/refdata/store/RefDataStore.java