Function walk_enum_member 

pub fn walk_enum_member<'arena, 'src, V: Visitor<'arena, 'src> + ?Sized>(
    visitor: &mut V,
    member: &EnumMember<'arena, 'src>,
) -> ControlFlow<V::Break>

Dispatches an enum member (case, method, constant, trait use, or property) to its child visitors.