referrerpolicy=no-referrer-when-downgrade
frame_support::storage::child

Function take_or

Source 
pub fn take_or<T: Codec + Sized>(
    child_info: &ChildInfo,
    key: &[u8],
    default_value: T,
) -> T
Expand description

Return the value of the item in storage under key, or default_value if there is no explicit entry. Ensure there is no explicit entry on return.