How to use the @uirouter/core.ViewService.normalizeUIViewTarget function in @uirouter/core

forEach(viewsDefinitionObject, function(config, name) {
    name = name || '$default'; // Account for views: { "": { template... } }
    if (Object.keys(config).length == 0) return;

    config.$type = 'react';
    config.$context = state;
    config.$name = name;

    let normalized = ViewService.normalizeUIViewTarget(config.$context, config.$name);
    config.$uiViewName = normalized.uiViewName;
    config.$uiViewContextAnchor = normalized.uiViewContextAnchor;

    views[name] = config;
  });
  return views;

forEach(viewsDefinitionObject, function(config, name) {
    name = name || '$default'; // Account for views: { "": { template... } }
    if (Object.keys(config).length == 0) return;

    config.$type = 'react';
    config.$context = state;
    config.$name = name;

    let normalized = ViewService.normalizeUIViewTarget(
      config.$context,
      config.$name,
    );
    config.$uiViewName = normalized.uiViewName;
    config.$uiViewContextAnchor = normalized.uiViewContextAnchor;

    views[name] = config;
  });
  return views;