layout.getGraphRect() returns wrong boundaries

Values freezes on 0 when should go below/above.

Happens when all points are right or left of Y axis.

When I count boundaries manually (when position vertices) everything works fine.
I use boundaries to count сircumscribed circle radius and to position graph in its center.

Locate layout.getGraphRect() and reproduce the issue with all points positioned to the right or left of the Y axis. Compare its boundaries with the manually counted vertex positions and verify that the circumscribed-circle radius and graph centering use the resulting rectangle. Done means boundaries can extend below or above zero instead of freezing at zero.

Written by the indexing model from the issue text.