Function walk_trait_use 

pub fn walk_trait_use<'arena, 'src, V: Visitor<'arena, 'src> + ?Sized>(
    visitor: &mut V,
    trait_use: &TraitUseDecl<'arena, 'src>,
) -> ControlFlow<()>

Visits a trait use declaration’s trait names and adaptations (insteadof, as).