context.addAvailableModules(build.getAvailableModules());
        } else {
            // Register the defined substitutions for included build
            context.registerSubstitution(substitutions.getRuleAction());
        }
    }

    private void build(RootBuildState build) {
        context.addAvailableModules(build.getAvailableModules());
    }

import org.gradle.internal.Pair;

import java.util.Set;

public interface CompositeBuildContext extends DependencySubstitutionRules {
    void addAvailableModules(Set<Pair<ModuleVersionIdentifier, ProjectComponentIdentifier>> availableModules);
    void registerSubstitution(Action<DependencySubstitution> substitutions);

    private final List<Action<DependencySubstitution>> substitutionRules = new ArrayList<>();

    public DefaultBuildableCompositeBuildContext() {
    }

    @Override
    public void addAvailableModules(Set<Pair<ModuleVersionIdentifier, ProjectComponentIdentifier>> availableModules) {
        this.availableModules.addAll(availableModules);
    }

    @Override