How to use the @node-red/registry.clear function in @node-red/registry

registerType: registerType,
    getType: registry.get,

    getNodeInfo: registry.getNodeInfo,
    getNodeList: registry.getNodeList,

    getModuleInfo: registry.getModuleInfo,

    getNodeConfigs: registry.getNodeConfigs,
    getNodeConfig: registry.getNodeConfig,
    getNodeIconPath: registry.getNodeIconPath,
    getNodeIcons: registry.getNodeIcons,
    getNodeExampleFlows: registry.getNodeExampleFlows,
    getNodeExampleFlowPath: registry.getNodeExampleFlowPath,

    clearRegistry: registry.clear,
    cleanModuleList: registry.cleanModuleList,

    // Flow handling
    loadFlows:  flows.load,
    startFlows: flows.startFlows,
    stopFlows:  flows.stopFlows,
    setFlows:   flows.setFlows,
    getFlows:   flows.getFlows,

    addFlow:     flows.addFlow,
    getFlow:     flows.getFlow,
    updateFlow:  flows.updateFlow,
    removeFlow:  flows.removeFlow,
    // disableFlow: flows.disableFlow,
    // enableFlow:  flows.enableFlow,