Taskgraph Transforms
Transforms are Python functions that can modify (or sometimes add and
remove) tasks from the graph. This section describes some of the transform
functions that are available in mozilla-central.
Other Transforms
There are tons of transforms that are not documented here. Consult the source files under taskcluster/gecko_taskgraph/transforms which provide lots of additional detail, both in the code itself and in comments and docstrings.