Pivotto's finite excluded-minor conjecture for graphic or bicircular lift matroids

Let $BL$ be the class of bicircular lift matroids, and let $\overline{BL}$ be the union of $BL$ with the class of graphic matroids. The class $\overline{BL}$ is minor-closed. Pivotto's conjecture. The class $\overline{BL}$ has a finite list of excluded minors. This conjecture concerns the structural characterization of matroids that are graphic or bicircular lift through excluded minors. The supplied text gives no evidence that the conjecture has been resolved.