I want to get all child comments ids from parent comment id. Do i have to write custom sql 
or can i use get\_comments() to achieve the following output.

eg 1

I want to get 2,3,4,5,6,7,8 ids from parent id 1.

```
|- 1 (parent comment)
|-- 2 ( child of 1)
|--- 3 ( grand child )
|-- 4 ( child of 1)
|--- 5 ( grand child )
|---- 6 ( grand grand child )
|----- 7 ( grand grand grand child )
|------ 8 ( grand grand grand grand child )

```

eg 2

I want to get 5,6,7,8 comment ids from parent id 4.

```
|- 1 (parent comment)
|-- 2 ( child of 1)
|--- 3 ( grand child )
|-- 4 ( child of 1)
|--- 5 ( grand child )
|---- 6 ( grand grand child )
|----- 7 ( grand grand grand child )
|------ 8 ( grand grand grand grand child )

```