How to get the estimated area value from mesh debug?

### Checklist

- [X] I have searched for [similar issues](https://github.com/isl-org/Open3D/issues).
- [X] For Python issues, I have tested with the [latest development wheel](http://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [X] I have checked the [release documentation](http://www.open3d.org/docs/release/) and the [latest documentation](http://www.open3d.org/docs/latest/) (for `master` branch).

### My Question

Following the example of open3D surface reconstruction for o3d.geometry.TriangleMesh.create_from_point_cloud_poisson

and this is the terminal output:

[Open3D DEBUG] Input Points / Samples: 1112 / 678
[Open3D DEBUG] # Got kernel density: 0.00023889541625976562 (s), 327.45703125 (MB) / 327.45703125 (MB) / 328 (MB)
[Open3D DEBUG] # Got normal field: 0.001909017562866211 (s), 327.45703125 (MB) / 327.45703125 (MB) / 328 (MB)
[Open3D DEBUG] Point weight / Estimated Area: 1.284378e-03 / 1.428228e+00
[Open3D DEBUG] # Finalized tree: 0.007986068725585938 (s), 327.45703125 (MB) / 327.45703125 (MB) / 328 (MB)
[Open3D DEBUG] # Set FEM constraints: 0.02118396759033203 (s), 327.45703125 (MB) / 327.45703125 (MB) / 328 (MB)
[Open3D DEBUG] #Set point constraints: 0.0027320384979248047 (s), 327.45703125 (MB) / 327.45703125 (MB) / 328 (MB)
[Open3D DEBUG] Leaf Nodes / Active Nodes / Ghost Nodes: 58528 / 66888 / 1
[Open3D DEBUG] Memory Usage: 327.457 MB

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i would like to access the estimated area value, how do i do it?