code: function isDummyElement(node) {
                  return (
                      !node.startTag &&
                      (node.name === "body" ||
                          node.name === "head" ||
                          node.name === "html")
                  )
              }
docs: Check whether the given token is a dummy element.
  @param {Token} node The token to check.
  @returns {boolean} `true` if the token is a dummy element.