def children(self):
return fn.json_each(self)<EOL>
Schema of `json_each` and `json_tree`:

key,
value,
type TEXT (object, array, string, etc),
atom (value for primitive/scalar types, NULL for array and object)
id INTEGER (unique identifier for element)
parent INTEGER (unique identifier of parent element or NULL)
fullkey TEXT (full path describing element)
path TEXT (path to the container of the current element)
json JSON hidden (1st input parameter to function)
root TEXT hidden (2nd input parameter, path at which to start)