referrerpolicy=no-referrer-when-downgrade
sp_io::default_child_storage

Function exists

Source 
pub fn exists(
    storage_key: <PassFatPointerAndRead<&[u8]> as RIType>::Inner,
    key: <PassFatPointerAndRead<&[u8]> as RIType>::Inner,
) -> <bool as RIType>::Inner
Expand description

Check a child storage key.

Check whether the given key exists in default child defined at storage_key.