Macro director::on

macro_rules! on {
    (state:$state:expr, $(|)? $( $pattern:pat_param )|+ $( if $guard: expr )? $(,)?) => { ... };
    ($expression:expr, $(|)? $( $pattern:pat_param )|+ $( if $guard: expr )? $(,)?) => { ... };
}

Indicates that the toggle is on.

Do not use

director::on!(state: Self, ..)

This must be a dead lock.