docs: private Entities toEntities(final JsonNode node, String text) throws IOException {
  		if (null == node || node.isNull() || node.isMissingNode()) {
  			return null;
  		}
  		final ObjectMapper mapper = this.createMapper();
  		Entities entities = mapper.readerFor(Entities.class).readValue(node);
  		extractTickerSymbolEntitiesFromText(text, entities);
  		return entities;
  	}