如何制作有2个hintText的TextField？

TextField(
  decoration: InputDecoration(
    hintText: 'Hint Text 1',
    hintStyle: TextStyle(color: Colors.grey),
    contentPadding: EdgeInsets.symmetric(vertical: 10),
    border: OutlineInputBorder(
      borderRadius: BorderRadius.circular(5),
    ),
  ),
),

Column(
  children: [
    TextField(
      decoration: InputDecoration(
        hintText: 'Hint Text 1',
        hintStyle: TextStyle(color: Colors.grey),
        contentPadding: EdgeInsets.symmetric(vertical: 10),
        border: OutlineInputBorder(
          borderRadius: BorderRadius.circular(5),
        ),
      ),
    ),
    SizedBox(height: 10),
    Text(
      'Hint Text 2',
      style: TextStyle(color: Colors.grey),
    ),
  ],
),