ent.createElement("div");
                gutterDiv.setAttribute("id", "code-annotation-line-highlight-gutter");
                gutterDiv.style.position = 'absolute';
                const codeCell = window.document.getElementById(targetCell);
                const gutter = codeCell.querySelector('.code-annotation-gutter');
                gutter.appendChild(gutterDiv);
              }
              gutterDiv.style.top = top - 2 + "px";
              gutterDiv.style.height = height + 4 + "px";
            