pub fn as_bool(&self) -> Option<bool> {
        match *self {
            ValueKind::Boolean(b) => Some(b),
            _ => None,
        }
    }
/// Extracts the boolean value if it is a boolean.
Extracts the boolean value if it is a boolean.
Extracts the boolean value if it is a boolean .
pub fn as_bool(&self) -> Option<bool> {
        match *self {
            ValueKind::Boolean(b) => Some(b),
            _ => None,
        }
    }
pub fn as_bool ( & self ) -> Option < bool > { match * self { ValueKind :: Boolean ( b ) => Some ( b ) , _ => None , } }
Extracts the boolean value if it is a boolean.
Extracts the boolean value if it is a boolean .
&self