{"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"///"}]}
    /// or else the root float var in the unification table.
    /// Resolves a float var to a rigid int type, if it was constrained to one,
    pub fn opportunistic_resolve_float_var(&self, vid: ty::FloatVid) -> Ty<'tcx> {