writeStringSet(encoder, confMappings.get(conf));
        }
        if (configurationAddedByRule) {
            // since the dependencies are reconstructed from the serialized form which interprets the mappings,
            // we have to make sure to also map from the new configuration.
            encoder.writeString(configurationName);

            writeCount(artifacts.size());
            for (Artifact artifact : artifacts) {
                IvyArtifactNameSerializer.INSTANCE.write(encoder, artifact.getArtifactName());
                writeStringSet(artifact.getConfigurations());
            }
        }

        private void writeIvyDependencies(List<IvyDependencyDescriptor> dependencies) throws IOException {
            writeCount(dependencies.size());

        encoder.writeBoolean(derivedVariant.isTransitive());
        encoder.writeBoolean(derivedVariant.isVisible());
        writeStringSet(encoder, derivedVariant.getHierarchy());
        writeMavenExcludeRules(encoder, derivedVariant.getExcludes());
        writeDependencies(encoder, derivedVariant, deduplicationDependencyCache);
    }

        Set<String> set = new LinkedHashSet<>(3 * size / 2, 0.9f);
        for (int i = 0; i < size; i++) {
            set.add(decoder.readString());
        }
        return set;
    }

    protected void writeStringSet(Encoder encoder, Set<String> values) throws IOException {
        encoder.writeSmallInt(values.size());
        for (String configuration : values) {
            encoder.writeString(configuration);
        }
    }