Macro noop_visit_mut_type

macro_rules! noop_visit_mut_type {
    (fail) => { ... };
    () => { ... };
    ($name:ident, $N:ident, fail) => { ... };
    ($name:ident, $N:ident) => { ... };
}

Available on crate features __ecma and __visit only.

Note: Ignoring more types is not considered as a breaking change.