return new DefaultToolchainManagerV4();
    }

    @Provides
    @Typed(ToolchainFactory.class)
    @Named("jdk")
    ToolchainFactory jdkFactory() {
        return createV3FactoryBridge("jdk");
    }

    /**
     * Creates a v3 ToolchainFactory bridge that wraps a v4 ToolchainFactory.
     */
    public ToolchainFactory createV3FactoryBridge(String type) {
        try {

              <exclude>org.apache.maven.toolchain.RequirementMatcherFactory</exclude>
              <exclude>org.apache.maven.toolchain.Toolchain</exclude>
              <exclude>org.apache.maven.toolchain.ToolchainFactory</exclude>
              <exclude>org.apache.maven.toolchain.ToolchainManager</exclude>
              <exclude>org.apache.maven.toolchain.ToolchainManagerPrivate</exclude>