pub fn as_empty(&self) -> Option<()> {
        match *self {
            Value::Empty => Some(()),
            _ => None,
        }
    }
/// Extracts the empty value if it is empty
Extracts the empty value if it is empty
Extracts the empty value if it is empty
pub fn as_empty(&self) -> Option<()> {
        match *self {
            Value::Empty => Some(()),
            _ => None,
        }
    }
pub fn as_empty ( & self ) -> Option < ( ) > { match * self { Value :: Empty => Some ( ( ) ) , _ => None , } }
Extracts the empty value if it is empty
Extracts the empty value if it is empty
&self
&self