GradleBuildSystem.java

boolean isForge = node.getChildren().stream()
    .filter(n -> n.getData() instanceof ModuleData)
    .filter(n -> ((ModuleData) n.getData()).getInternalName().equals(module.getName()))
    .limit(1)
    .flatMap(n -> n.getChildren().stream())
    .filter(n -> n.getData() instanceof GradleSourceSetData || n.getData() instanceof LibraryDependencyData)
    .filter(n -> !(n.getData() instanceof GradleSourceSetData) || ((GradleSourceSetData) n.getData()).getId().contains("main"))
    .filter(n -> ((GradleSourceSetData) n.getData()).getId().contains("main"))
    .limit(1)
    .flatMap(n -> {
        if (n.getData() instanceof GradleSourceSetData) {
            return n.getChildren().stream();
        } else {
            return Stream.of(n);
        }
    })
    .filter(n -> n.getData() instanceof LibraryDependencyData)
    .map(n -> (LibraryDependencyData) n.getData())
    .filter(l -> l.getExternalName().isEmpty())
    .anyMatch(l -> l.getTarget().getPaths(LibraryPathType.BINARY).stream()
        .anyMatch(p -> p.contains("forgeSrc"))
    );