private void putExampleRequest(String serviceName, String methodName, String serializedExampleRequest) {
        exampleRequests.computeIfAbsent(serviceName, unused -> ArrayListMultimap.create())
                       .put(methodName, serializedExampleRequest);
    }
Adds the specified {@link DescriptiveTypeInfoProvider} used to create a {@link DescriptiveTypeInfo} from
a type descriptor.
core/src/main/java/com/linecorp/armeria/server/docs/DocServiceBuilder.java