pub fn is_no_value(&self) -> bool{
        log("Calling Example1::is_no_value");

        match self{
            Example1::NoValue => true,
            _ => false,
        }
    }
/// true se o enum for Example1::NoValue.
true se o enum for Example1::NoValue.
true se o enum for Example1 :: NoValue .
pub fn is_no_value(&self) -> bool{
        log("Calling Example1::is_no_value");
        match self{
            Example1::NoValue => true,
            _ => false,
        }
    }
pub fn is_no_value ( & self ) -> bool { log ( " " ) ; match self { Example1 :: NoValue => true , _ => false , } }
true se o enum for Example1::NoValue.
true se o enum for Example1 :: NoValue .
&self