for (ToolchainModel model : models) {
                    try {
                        ToolchainPrivate toolchain = fact.createToolchain(model);
                        if (requirements == null || toolchain.matchesRequirements(requirements)) {
                            toolchains.add(toolchain);
                        }
                    } catch (MisconfiguredToolchainException ex) {

        public String findTool(String toolName) {
            return toolchain.findTool(toolName);
        }

        @Override
        public boolean matchesRequirements(Map<String, String> requirements) {
            return ((ToolchainPrivate) toolchain).matchesRequirements(requirements);
        }
    }