return factory.doConcatIsolatable(usageNode, LibraryElements.LIBRARY_ELEMENTS_ATTRIBUTE, isolatableFactory.isolate(instantiator.named(LibraryElements.class, libraryElements)));
        } else {
            ImmutableAttributes usageNode = factory.doConcatIsolatable(node, key, new CoercingStringValueSnapshot(usage, instantiator));

            return usageCompatibilityHandler.doConcat(this, node, key, value);
        } else {
            return doConcatIsolatable(node, key, value);
        }
    }

    ImmutableAttributes doConcatIsolatable(ImmutableAttributes node, Attribute<?> key, @Nullable Isolatable<?> value) {
        synchronized (this) {