@Override
            public Function<FunctionNode, Optional<LibraryFunction>> createFunctionFactory() {
                return node -> {
                    if (libraryFunctions.containsKey(node.getName())) {
                        return Optional.of(libraryFunctions.get(node.getName()).createFunction(node));
                    }
                    return Optional.empty();
                };
            }
Gets loaded authentication scheme validators.

@return a list of {@link AuthSchemeValidator}s.
smithy-rules-engine/src/main/java/software/amazon/smithy/rulesengine/language/EndpointComponentFactory.java