/// Tests whether this value is empty
Tests whether this value is empty
Tests whether this value is empty
pub fn is_empty(&self) -> bool {
        match *self {
            Value::Empty => true,
            _ => false,
        }
    }
pub fn is_empty ( & self ) -> bool { match * self { Value :: Empty => true , _ => false , } }
Tests whether this value is empty
Tests whether this value is empty
&self