Ağacın kategori şeklinde gözükmesi için.

hiyerarsikSelect.js

 const menuItem = (obj, depth) => {
    let line = "";
    for (let i = 0; i < depth; i++) {
      line += " — ";
    }
    return (
      <MenuItem value={obj.id} onChange={handleMultiple}>
        {line} {obj.name}
      </MenuItem>
    );
  };
  const writeOrdered = (obj, depth) => {
    const element = menuItem(obj, depth); // root
    allCategoriesOrdered.push(element);
    if (obj.children.length > 0) {
      depth++;
      obj.children.forEach((category) => {
        writeOrdered(category, depth);
      });
    }
  };