// One of two flat-imported authors of a same-name `Box` struct. With both modules
// flat-visible from a file that authors none itself, every bare reference to the
// name is genuinely ambiguous — at EVERY use surface, including the ones E6b-R
// newly routed through the source-aware engine (wrapper aliases, tuple-literal
// elements, enum/union body-builder child types, inline-anonymous types).
Box :: struct { x: i32; }