Java2Swift: nested types in generic types

For example trying to import guava 'com.google.guava:guava:33.3.1-jre' results in:

/Users/ktoso/code/swift-java/Samples/JavaDependencySampleApp/.build/plugins/outputs/javadependencysampleapp/JavaGuava/destination/Java2SwiftPlugin/generated/ImmutableList+Builder.swift:7:63: error: reference to generic type 'ImmutableList<E>.SubList.Builder' requires arguments in <...>
 5 | extension ImmutableList {
 6 |   @JavaClass("com.google.common.collect.ImmutableList$Builder")
 7 |   open class Builder<E: AnyJavaObject>: ImmutableList.SubList.Builder {
   |                                                               `- error: reference to generic type 'ImmutableList<E>.SubList.Builder' requires arguments in <...>
 8 |   @JavaMethod
 9 |   @_nonoverride public convenience init(environment: JNIEnvironment? = nil)

Reproduce the failure by importing guava 33.3.1-jre in Samples/JavaDependencySampleApp and inspect the generated ImmutableList+Builder.swift file under the Java2SwiftPlugin output. Trace how Java2Swift represents nested types inside generic types; the work is done when the generated Guava bindings compile without the reported generic-argument error.