The icons here are licensed under the CC-by-SA 3. You can find the full text of
the license at:

  http://creativecommons.org/licenses/by-sa/3.0/

They were taken from https://gitlab.gnome.org/GNOME/gnome-builder/ on December 9, 2018 at 10:58 UTC and modified.
See gnome-builder's git commit history for original authors and contributors to individual icons.
