build: rename _toc to toc (#463)
build: rename _toc to toc (#463)

Source-Author: F. Hinkelmann <bfca2660d8321d14063d908366d26ce6f4981952@gmail.com>
Source-Date: Tue Jul 21 10:53:20 2020 -0400
Source-Repo: googleapis/synthtool
Source-Sha: 99c93fe09f8c1dca09dfc0301c8668e3a70dd796
Source-Link: https://github.com/googleapis/synthtool/commit/99c93fe09f8c1dca09dfc0301c8668e3a70dd796

Co-authored-by: sofisl <db5f31dcffac94c616d6f139fc6a9d43079218ec@users.noreply.github.com>
googleapis/google-cloud-node,googleapis/google-cloud-node,googleapis/google-cloud-node,googleapis/google-cloud-node