How to use the @sanity/desk-tool/structure-builder.listItem function in @sanity/desk-tool

.title('Content')
    .items([
      S.listItem()
        .title('Settings')
        .icon(MdSettings)
        .child(
          S.editor()
            .id('siteSettings')
            .schemaType('siteSettings')
            .documentId('siteSettings')
        ),
      S.listItem()
        .title('Attendees')
        .schemaType('attendee')
        .child(S.documentTypeList('attendee').title('Attendees')),
      S.listItem()
        .title('Speakers')
        .icon(MdPerson)
        .schemaType('speaker')
        .child(S.documentTypeList('speaker').title('Speakers')),
      // This returns an array of all the document types
      // defined in schema.js. We filter out those that we have
      // defined the structure above
      ...S.documentTypeListItems().filter(hiddenDocTypes)
    ])

.title('Content')
    .items([
      S.listItem()
        .title('Settings')
        .icon(MdSettings)
        .child(
          S.editor()
            .id('siteSettings')
            .schemaType('siteSettings')
            .documentId('siteSettings')
        ),
      S.listItem()
        .title('Blog posts')
        .schemaType('post')
        .child(S.documentTypeList('post').title('Blog posts')),
      S.listItem()
        .title('Authors')
        .icon(MdPerson)
        .schemaType('author')
        .child(S.documentTypeList('author').title('Authors')),
      S.listItem()
        .title('Categories')
        .schemaType('category')
        .child(S.documentTypeList('category').title('Categories')),
      // This returns an array of all the document types
      // defined in schema.js. We filter out those that we have
      // defined the structure above
      ...S.documentTypeListItems().filter(hiddenDocTypes)
    ])

.title('Content')
    .items([
      S.listItem()
        .title('Settings')
        .child(
          S.editor()
            .id('siteSettings')
            .schemaType('siteSettings')
            .documentId('siteSettings')
        )
        .icon(MdSettings),
      S.listItem()
        .title('Projects')
        .schemaType('project')
        .child(S.documentTypeList('project').title('Projects')),
      S.listItem()
        .title('People')
        .schemaType('person')
        .child(S.documentTypeList('person').title('People')),
      S.listItem()
        .title('Categories')
        .schemaType('category')
        .child(S.documentTypeList('category').title('Categories')),
      // This returns an array of all the document types
      // defined in schema.js. We filter out those that we have
      // defined the structure above
      ...S.documentTypeListItems().filter(hiddenDocTypes)
    ])

.title('Content')
    .items([
      S.listItem()
        .title('Settings')
        .icon(MdSettings)
        .child(
          S.editor()
            .id('siteSettings')
            .schemaType('siteSettings')
            .documentId('siteSettings')
        ),
      S.listItem()
        .title('Blog posts')
        .schemaType('post')
        .child(S.documentTypeList('post').title('Blog posts')),
      S.listItem()
        .title('Authors')
        .icon(MdPerson)
        .schemaType('author')
        .child(S.documentTypeList('author').title('Authors')),
      S.listItem()
        .title('Categories')
        .schemaType('category')
        .child(S.documentTypeList('category').title('Categories')),
      // This returns an array of all the document types
      // defined in schema.js. We filter out those that we have
      // defined the structure above
      ...S.documentTypeListItems().filter(hiddenDocTypes)
    ])

S.list()
                    .title('Depth 2')
                    .items([
                      S.listItem()
                        .title('Even deeper')
                        .child(
                          S.list()
                            .title('Depth 3')
                            .items([
                              S.listItem()
                                .title('Keep digging')
                                .child(
                                  S.list()
                                    .title('Depth 4')
                                    .items([
                                      S.listItem()
                                        .title('Dig into the core of the earth')
                                        .child(
                                          S.list()
                                            .title('Depth 5')
                                            .items([
                                              S.documentListItem()
                                                .id('grrm')
                                                .schemaType('author')
                                            ])
                                        )
                                    ])
                                )
                            ])
                        )
                    ])
                )

export default () =>
  S.list()
    .title("Content")
    .items([
      S.listItem()
        .title("Company Info")
        .schemaType("companyInfo")
        .child(
          S.editor()
            .id('companyInfo')
            .schemaType("companyInfo")
            .documentId("company-info")
        ),
      S.listItem()
      .title('Website')
      .schemaType("page")
      .child(
        S.list()
        .title("Website")
        .id('website')
        .items([

.items([
              S.listItem()
                .title("List of Work")
                .schemaType("work")
                .child(S.documentTypeList("work").title("List of Work")),
              S.listItem()
                .title("Categories")
                .schemaType("categories")
                .child(S.documentTypeList("categories").title("Categories")),
              S.listItem()
                .title("Publisher Logos")
                .schemaType("logos")
                .child(S.documentTypeList("logos").title("Publisher Logos")),
            ])
        ),
      S.listItem()
        .title("Website Pages")
        .child(
          S.list()
            .title("Pages")
            .items([
              S.listItem()
                .title("Home Page")
                .icon(MdInsertDriveFile)
                .child(
                  S.editor()
                    .schemaType("homePage")
                    .documentId("homePage")
                ),
              S.listItem()
                .title("Work Page")
                .icon(MdInsertDriveFile)

export default () =>
  S.list()
    .title('Site')
    .items([
      S.listItem()
        .title('Site config')
        .icon(MdSettings)
        .child(
          S.editor()
            .id('config')
            .schemaType('site-config')
            .documentId('global-config')
        ),
      S.listItem()
        .title('Pages')
        .icon(MdDashboard)
        .schemaType('page')
        .child(S.documentTypeList('page').title('Pages')),
      S.listItem()
        .title('Routes')
        .schemaType('route')

export default () =>
  S.list()
    .title('Content')
    .items([
      S.listItem()
        .title('Settings')
        .icon(MdSettings)
        .child(
          S.editor()
            .id('siteSettings')
            .schemaType('siteSettings')
            .documentId('siteSettings')
        ),
      S.listItem()
        .title('Blog posts')
        .schemaType('post')
        .child(
          S.documentTypeList('post')
            .title('Blog posts')
            .child(documentId =>
              S.document()
                .documentId(documentId)
                .schemaType('post')
                .views([S.view.form(), S.view.component(Preview)])
            )
        ),
      S.listItem()
        .title('Authors')
        .icon(MdPerson)
        .schemaType('author')