How to use the @lrnwebcomponents/haxcms-elements/lib/core/haxcms-site-store.js.store.computeItems function in @lrnwebcomponents/haxcms-elements

async print(e) {
    // now dynamic import the footer so we don't bloat all other page loads
    import("@lrnwebcomponents/haxcms-elements/lib/ui-components/layout/site-footer.js");
    const type = this.type;
    let content = "";
    if (type === "page") {
      // oh there you are
      content = `
      <h1>${store.activeItem.title}</h1>
      <div>${store.activeItemContent}</div>`;
    } else if (type === "parent") {
      // everything from the parent of this page, down
      const result = store.computeItems(
        1,
        100,
        store.activeId,
        "parent",
        store.routerManifest,
        true
      );
      for (var i in result) {
        content += await fetch("pages/" + result[i].location + "/index.html")
          .then(function(response) {
            return response.text();
          })
          .then(function(response) {
            let indent = result[i].indent + 1;
            if (indent &gt; 6) {
              indent = 6;

content += await fetch("pages/" + result[i].location + "/index.html")
          .then(function(response) {
            return response.text();
          })
          .then(function(response) {
            let indent = result[i].indent + 1;
            if (indent > 6) {
              indent = 6;
            }
            return `${result[i].title}
              ${response}`;
          });
      }
    } else if (type === "ancestor") {
      // everything from highest parent
      const result = store.computeItems(
        1,
        100,
        store.activeId,
        "ancestor",
        store.routerManifest,
        true
      );
      for (var i in result) {
        content += await fetch("pages/" + result[i].location + "/index.html")
          .then(function(response) {
            return response.text();
          })
          .then(function(response) {
            let indent = result[i].indent + 1;
            if (indent > 6) {
              indent = 6;

_computeItems(
    start,
    end,
    parent,
    dynamicMethodology,
    _routerManifest,
    noDynamicLevel
  ) {
    if (_routerManifest) {
      return store.computeItems(
        start,
        end,
        parent,
        dynamicMethodology,
        _routerManifest,
        noDynamicLevel
      );
    }
  }
  /**