protected abstract Collection<InstrumentationProcessorExtension> getExtensions();

    @Override
    public Set<String> getSupportedOptions() {
        return new HashSet<>(Arrays.asList("org.gradle.annotation.processing.aggregating", PROJECT_NAME_OPTIONS));
    }

    @Override
    public Set<String> getSupportedAnnotationTypes() {

and return its true type at runtime using the link:{javaApi}/javax/annotation/processing/Processor.html#getSupportedOptions--[Processor#getSupportedOptions()] method.

=== Example: Registering incremental annotation processors dynamically

[source,java,indent=0]
.processor/src/main/java/org/gradle/ServiceRegistryProcessor.java
----