tree b64db90b3268fd18c41a58ae1052c02b8d7e35c7
parent 7f5d5becddbb9bf125ebfb69c936735ce5ca41b0
author A. Unique TensorFlower <gardener@tensorflow.org> 1584656026 -0700
committer TensorFlower Gardener <gardener@tensorflow.org> 1584656389 -0700

check attribute existence before access it. attribute is not always traced in our case.

PiperOrigin-RevId: 301904777
Change-Id: Iaf15ad3443354b7f183ffd34f678827d8536ae3a